56453440 has 28 divisors (see below), whose sum is σ = 134430516. Its totient is φ = 22581248.

The previous prime is 56453437. The next prime is 56453443. The reversal of 56453440 is 4435465.

It is an interprime number because it is at equal distance from previous prime (56453437) and next prime (56453443).

It can be written as a sum of positive squares in 2 ways, for example, as 12787776 + 43665664 = 3576^2 + 6608^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56453443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87889 + ... + 88528.

Almost surely, 2^56453440 is an apocalyptic number.

It is an amenable number.

56453440 is an abundant number, since it is smaller than the sum of its proper divisors (77977076).

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

56453440 is a wasteful number, since it uses less digits than its factorization.

56453440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176434 (or 176424 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 31.

The square root of 56453440 is about 7513.5504257308. The cubic root of 56453440 is about 383.6160804091.

The spelling of 56453440 in words is "fifty-six million, four hundred fifty-three thousand, four hundred forty".