56143240 has 32 divisors (see below), whose sum is σ = 127558080. Its totient is φ = 22237632.

The previous prime is 56143237. The next prime is 56143249. The reversal of 56143240 is 4234165.

It is not an unprimeable number, because it can be changed into a prime (56143249) 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, 2694 + ... + 10933.

It is an arithmetic number, because the mean of its divisors is an integer number (3986190).

Almost surely, 2^56143240 is an apocalyptic number.

It is an amenable number.

56143240 is an abundant number, since it is smaller than the sum of its proper divisors (71414840).

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

56143240 is a wasteful number, since it uses less digits than its factorization.

56143240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13741 (or 13737 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 56143240 is about 7492.8792863625. The cubic root of 56143240 is about 382.9121591371.

The spelling of 56143240 in words is "fifty-six million, one hundred forty-three thousand, two hundred forty".