57552390 has 128 divisors (see below), whose sum is σ = 180357120. Its totient is φ = 12783744.

The previous prime is 57552377. The next prime is 57552401. The reversal of 57552390 is 9325575.

57552390 is a `hidden beast` number, since 575 + 52 + 39 + 0 = 666.

57552390 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 69519 + ... + 70341.

It is an arithmetic number, because the mean of its divisors is an integer number (1409040).

Almost surely, 2^57552390 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 57552390, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90178560).

57552390 is an abundant number, since it is smaller than the sum of its proper divisors (122804730).

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

57552390 is a wasteful number, since it uses less digits than its factorization.

57552390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 883 (or 877 counting only the distinct ones).

The product of its (nonzero) digits is 47250, while the sum is 36.

The square root of 57552390 is about 7586.3291518362. The cubic root of 57552390 is about 386.0893195361.

The spelling of 57552390 in words is "fifty-seven million, five hundred fifty-two thousand, three hundred ninety".