56309240 has 32 divisors (see below), whose sum is σ = 136442880. Its totient is φ = 20790912.

The previous prime is 56309233. The next prime is 56309249. The reversal of 56309240 is 4290365.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56309249) 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, 53624 + ... + 54663.

It is an arithmetic number, because the mean of its divisors is an integer number (4263840).

Almost surely, 2^56309240 is an apocalyptic number.

It is an amenable number.

56309240 is an abundant number, since it is smaller than the sum of its proper divisors (80133640).

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

56309240 is a wasteful number, since it uses less digits than its factorization.

56309240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108311 (or 108307 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 56309240 is about 7503.9482940649. The cubic root of 56309240 is about 383.2891761781.

The spelling of 56309240 in words is "fifty-six million, three hundred nine thousand, two hundred forty".