57820438 has 16 divisors (see below), whose sum is σ = 93693600. Its totient is φ = 26603136.

The previous prime is 57820429. The next prime is 57820447. The reversal of 57820438 is 83402875.

It is an interprime number because it is at equal distance from previous prime (57820429) and next prime (57820447).

It is a junction number, because it is equal to n+sod(n) for n = 57820397 and 57820406.

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, 5463 + ... + 12061.

It is an arithmetic number, because the mean of its divisors is an integer number (5855850).

Almost surely, 2^57820438 is an apocalyptic number.

57820438 is a deficient number, since it is larger than the sum of its proper divisors (35873162).

57820438 is a wasteful number, since it uses less digits than its factorization.

57820438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6951.

The product of its (nonzero) digits is 53760, while the sum is 37.

The square root of 57820438 is about 7603.9751446201. The cubic root of 57820438 is about 386.6877900007.

The spelling of 57820438 in words is "fifty-seven million, eight hundred twenty thousand, four hundred thirty-eight".