7223400 has 72 divisors (see below), whose sum is σ = 24264630. Its totient is φ = 1925760.

The previous prime is 7223369. The next prime is 7223417. The reversal of 7223400 is 43227.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 6380676 + 842724 = 2526^2 + 918^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is a hoax number, since the sum of its digits (18) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an Ulam number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 207 + ... + 3806.

Almost surely, 2^7223400 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7223400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12132315).

7223400 is an abundant number, since it is smaller than the sum of its proper divisors (17041230).

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

7223400 is a wasteful number, since it uses less digits than its factorization.

7223400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4035 (or 4023 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 18.

The square root of 7223400 is about 2687.6383685310. The cubic root of 7223400 is about 193.3068400743.

Adding to 7223400 its reverse (43227), we get a palindrome (7266627).

The spelling of 7223400 in words is "seven million, two hundred twenty-three thousand, four hundred".