57128136 has 128 divisors (see below), whose sum is σ = 169344000. Its totient is φ = 15890688.

The previous prime is 57128087. The next prime is 57128161. The reversal of 57128136 is 63182175.

It is a junction number, because it is equal to n+sod(n) for n = 57128097 and 57128106.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 136135 + ... + 136553.

It is an arithmetic number, because the mean of its divisors is an integer number (1323000).

Almost surely, 2^57128136 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 57128136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84672000).

57128136 is an abundant number, since it is smaller than the sum of its proper divisors (112215864).

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

57128136 is a wasteful number, since it uses less digits than its factorization.

57128136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 483 (or 479 counting only the distinct ones).

The product of its digits is 10080, while the sum is 33.

The square root of 57128136 is about 7558.3156853892. The cubic root of 57128136 is about 385.1382783217.

The spelling of 57128136 in words is "fifty-seven million, one hundred twenty-eight thousand, one hundred thirty-six".