56839540 has 24 divisors (see below), whose sum is σ = 119814912. Its totient is φ = 22649760.

The previous prime is 56839529. The next prime is 56839543. The reversal of 56839540 is 4593865.

It is a junction number, because it is equal to n+sod(n) for n = 56839493 and 56839502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56839543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 177 + ... + 10663.

It is an arithmetic number, because the mean of its divisors is an integer number (4992288).

Almost surely, 2^56839540 is an apocalyptic number.

It is an amenable number.

56839540 is an abundant number, since it is smaller than the sum of its proper divisors (62975372).

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

56839540 is a wasteful number, since it uses less digits than its factorization.

56839540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10767 (or 10765 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 40.

The square root of 56839540 is about 7539.2002228353. The cubic root of 56839540 is about 384.4886447844.

The spelling of 56839540 in words is "fifty-six million, eight hundred thirty-nine thousand, five hundred forty".