40550000 has 60 divisors (see below), whose sum is σ = 98321832. Its totient is φ = 16200000.

The previous prime is 40549997. The next prime is 40550023. The reversal of 40550000 is 5504.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 49595 + ... + 50405.

Almost surely, 2^40550000 is an apocalyptic number.

40550000 is a gapful number since it is divisible by the number (40) 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 40550000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49160916).

40550000 is an abundant number, since it is smaller than the sum of its proper divisors (57771832).

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

40550000 is an frugal number, since it uses more digits than its factorization.

40550000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 844 (or 818 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 14.

The square root of 40550000 is about 6367.8881899732. Note that the first 3 decimals coincide. The cubic root of 40550000 is about 343.5555373943. Note that the first 4 decimals are identical.

Adding to 40550000 its reverse (5504), we get a palindrome (40555504).

It can be divided in two parts, 405 and 50000, that multiplied together give a square (20250000 = 4500²).

The spelling of 40550000 in words is "forty million, five hundred fifty thousand".