57135402 has 64 divisors (see below), whose sum is σ = 135907200. Its totient is φ = 17729280.

The previous prime is 57135383. The next prime is 57135461. The reversal of 57135402 is 20453175.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

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, 99777 + ... + 100347.

It is an arithmetic number, because the mean of its divisors is an integer number (2123550).

Almost surely, 2^57135402 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 57135402, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67953600).

57135402 is an abundant number, since it is smaller than the sum of its proper divisors (78771798).

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

57135402 is a wasteful number, since it uses less digits than its factorization.

57135402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 708 (or 702 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 27.

The square root of 57135402 is about 7558.7963327503. The cubic root of 57135402 is about 385.1546059220.

Adding to 57135402 its reverse (20453175), we get a palindrome (77588577).

The spelling of 57135402 in words is "fifty-seven million, one hundred thirty-five thousand, four hundred two".