56456440 has 16 divisors (see below), whose sum is σ = 127027080. Its totient is φ = 22582560.

The previous prime is 56456423. The next prime is 56456461. The reversal of 56456440 is 4465465.

It is a junction number, because it is equal to n+sod(n) for n = 56456396 and 56456405.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 705666 + ... + 705745.

Almost surely, 2^56456440 is an apocalyptic number.

It is an amenable number.

56456440 is an abundant number, since it is smaller than the sum of its proper divisors (70570640).

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

56456440 is a wasteful number, since it uses less digits than its factorization.

56456440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1411422 (or 1411418 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 34.

The square root of 56456440 is about 7513.7500623856. The cubic root of 56456440 is about 383.6228755536.

It can be divided in two parts, 564564 and 40, that multiplied together give a triangular number (22582560 = T₆₇₂₀).

The spelling of 56456440 in words is "fifty-six million, four hundred fifty-six thousand, four hundred forty".