7523920 has 20 divisors (see below), whose sum is σ = 17493300. Its totient is φ = 3009536.

The previous prime is 7523909. The next prime is 7523927. The reversal of 7523920 is 293257.

It can be written as a sum of positive squares in 2 ways, for example, as 5345344 + 2178576 = 2312^2 + 1476^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7523927) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 46945 + ... + 47104.

It is an arithmetic number, because the mean of its divisors is an integer number (874665).

Almost surely, 2^7523920 is an apocalyptic number.

It is an amenable number.

7523920 is an abundant number, since it is smaller than the sum of its proper divisors (9969380).

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

7523920 is a wasteful number, since it uses less digits than its factorization.

7523920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94062 (or 94056 counting only the distinct ones).

The product of its (nonzero) digits is 3780, while the sum is 28.

The square root of 7523920 is about 2742.9764854989. The cubic root of 7523920 is about 195.9512581838.

The spelling of 7523920 in words is "seven million, five hundred twenty-three thousand, nine hundred twenty".