57438690 has 16 divisors (see below), whose sum is σ = 137852928. Its totient is φ = 15316976.

The previous prime is 57438679. The next prime is 57438707. The reversal of 57438690 is 9683475.

It is a happy number.

It is a super-2 number, since 2×57438690² = 6598406217832200, which contains 22 as substring.

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, 957282 + ... + 957341.

It is an arithmetic number, because the mean of its divisors is an integer number (8615808).

Almost surely, 2^57438690 is an apocalyptic number.

57438690 is an abundant number, since it is smaller than the sum of its proper divisors (80414238).

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

57438690 is a wasteful number, since it uses less digits than its factorization.

57438690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1914633.

The product of its (nonzero) digits is 181440, while the sum is 42.

The square root of 57438690 is about 7578.8317041613. The cubic root of 57438690 is about 385.8349003550.

The spelling of 57438690 in words is "fifty-seven million, four hundred thirty-eight thousand, six hundred ninety".