57155072 has 80 divisors (see below), whose sum is σ = 127408512. Its totient is φ = 25436160.

The previous prime is 57155057. The next prime is 57155081. The reversal of 57155072 is 27055175.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 206198 + ... + 206474.

Almost surely, 2^57155072 is an apocalyptic number.

57155072 is a gapful number since it is divisible by the number (52) 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 57155072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63704256).

57155072 is an abundant number, since it is smaller than the sum of its proper divisors (70253440).

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

57155072 is a wasteful number, since it uses less digits than its factorization.

57155072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339 (or 323 counting only the distinct ones).

The product of its (nonzero) digits is 12250, while the sum is 32.

The square root of 57155072 is about 7560.0973538705. The cubic root of 57155072 is about 385.1987998986.

The spelling of 57155072 in words is "fifty-seven million, one hundred fifty-five thousand, seventy-two".