57642638 has 16 divisors (see below), whose sum is σ = 89498304. Its totient is φ = 27824640.

The previous prime is 57642617. The next prime is 57642643. The reversal of 57642638 is 83624675.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a junction number, because it is equal to n+sod(n) for n = 57642595 and 57642604.

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, 4331 + ... + 11577.

It is an arithmetic number, because the mean of its divisors is an integer number (5593644).

Almost surely, 2^57642638 is an apocalyptic number.

57642638 is a deficient number, since it is larger than the sum of its proper divisors (31855666).

57642638 is a wasteful number, since it uses less digits than its factorization.

57642638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7387.

The product of its digits is 241920, while the sum is 41.

The square root of 57642638 is about 7592.2748896493. The cubic root of 57642638 is about 386.2910232469.

The spelling of 57642638 in words is "fifty-seven million, six hundred forty-two thousand, six hundred thirty-eight".