56118640 has 40 divisors (see below), whose sum is σ = 134009280. Its totient is φ = 21839616.

The previous prime is 56118631. The next prime is 56118641. The reversal of 56118640 is 4681165.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56118641) 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, 6520 + ... + 12439.

It is an arithmetic number, because the mean of its divisors is an integer number (3350232).

Almost surely, 2^56118640 is an apocalyptic number.

It is an amenable number.

56118640 is an abundant number, since it is smaller than the sum of its proper divisors (77890640).

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

56118640 is a wasteful number, since it uses less digits than its factorization.

56118640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19009 (or 19003 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 56118640 is about 7491.2375479623. The cubic root of 56118640 is about 382.8562247376.

The spelling of 56118640 in words is "fifty-six million, one hundred eighteen thousand, six hundred forty".