33000000 has 196 divisors, whose sum is σ = 119060976. Its totient is φ = 8000000.

The previous prime is 32999983. The next prime is 33000001. The reversal of 33000000 is 33.

It is a Harshad number since it is a multiple of its sum of digits (6).

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is a nialpdrome in base 10.

It is a zygodrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (33000001) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 2999995 + ... + 3000005.

Almost surely, 2^33000000 is an apocalyptic number.

33000000 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 33000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59530488).

33000000 is an abundant number, since it is smaller than the sum of its proper divisors (86060976).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

33000000 is an frugal number, since it uses more digits than its factorization.

33000000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56 (or 21 counting only the distinct ones).

The product of its (nonzero) digits is 9, while the sum is 6.

The square root of 33000000 is about 5744.5626465380. The cubic root of 33000000 is about 320.7534329996.

Adding to 33000000 its reverse (33), we get a palindrome (33000033).

Multiplying 33000000 by its reverse (33), we get a square (1089000000 = 33000²).

33000000 divided by its reverse (33) gives a 6-th power (1000000 = 10⁶).

It can be divided in two parts, 3 and 3000000, that multiplied together give a square (9000000 = 3000²).

The spelling of 33000000 in words is "thirty-three million", and thus it is an aban number and an uban number.