57638839 has 4 divisors (see below), whose sum is σ = 58583800. Its totient is φ = 56693880.

The previous prime is 57638831. The next prime is 57638879. The reversal of 57638839 is 93883675.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 57638839 - 2³ = 57638831 is a prime.

It is a super-2 number, since 2×57638839² = 6644471522535842, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 57638792 and 57638801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57638831) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 472389 + ... + 472510.

It is an arithmetic number, because the mean of its divisors is an integer number (14645950).

Almost surely, 2^57638839 is an apocalyptic number.

57638839 is a deficient number, since it is larger than the sum of its proper divisors (944961).

57638839 is an equidigital number, since it uses as much as digits as its factorization.

57638839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 944960.

The product of its digits is 1088640, while the sum is 49.

The square root of 57638839 is about 7592.0246970094. The cubic root of 57638839 is about 386.2825367521.

The spelling of 57638839 in words is "fifty-seven million, six hundred thirty-eight thousand, eight hundred thirty-nine".