57838640 has 20 divisors (see below), whose sum is σ = 134475024. Its totient is φ = 23135424.

The previous prime is 57838639. The next prime is 57838657. The reversal of 57838640 is 4683875.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (20).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 361412 + ... + 361571.

Almost surely, 2^57838640 is an apocalyptic number.

It is an amenable number.

57838640 is an abundant number, since it is smaller than the sum of its proper divisors (76636384).

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

57838640 is a wasteful number, since it uses less digits than its factorization.

57838640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 722996 (or 722990 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 41.

The square root of 57838640 is about 7605.1719244209. The cubic root of 57838640 is about 386.7283624635.

The spelling of 57838640 in words is "fifty-seven million, eight hundred thirty-eight thousand, six hundred forty".