57839240 has 16 divisors (see below), whose sum is σ = 130138380. Its totient is φ = 23135680.

The previous prime is 57839239. The next prime is 57839269. The reversal of 57839240 is 4293875.

It can be written as a sum of positive squares in 2 ways, for example, as 55323844 + 2515396 = 7438^2 + 1586^2 .

It is a junction number, because it is equal to n+sod(n) for n = 57839194 and 57839203.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 722951 + ... + 723030.

Almost surely, 2^57839240 is an apocalyptic number.

It is an amenable number.

57839240 is an abundant number, since it is smaller than the sum of its proper divisors (72299140).

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

57839240 is a wasteful number, since it uses less digits than its factorization.

57839240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1445992 (or 1445988 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 38.

The square root of 57839240 is about 7605.2113711586. The cubic root of 57839240 is about 386.7296997253.

The spelling of 57839240 in words is "fifty-seven million, eight hundred thirty-nine thousand, two hundred forty".