56445740 has 48 divisors (see below), whose sum is σ = 129783360. Its totient is φ = 20494080.

The previous prime is 56445733. The next prime is 56445773. The reversal of 56445740 is 4754465.

It is a super-2 number, since 2×56445740² = 6372243128295200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 56445740.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14081 + ... + 17639.

It is an arithmetic number, because the mean of its divisors is an integer number (2703820).

Almost surely, 2^56445740 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 56445740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64891680).

56445740 is an abundant number, since it is smaller than the sum of its proper divisors (73337620).

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

56445740 is a wasteful number, since it uses less digits than its factorization.

56445740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3642 (or 3640 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 35.

The square root of 56445740 is about 7513.0380007025. The cubic root of 56445740 is about 383.5986384361.

The spelling of 56445740 in words is "fifty-six million, four hundred forty-five thousand, seven hundred forty".