56406040 has 32 divisors (see below), whose sum is σ = 127136880. Its totient is φ = 22522752.

The previous prime is 56406023. The next prime is 56406047. The reversal of 56406040 is 4060465.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 56405996 and 56406014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56406047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34522 + ... + 36118.

Almost surely, 2^56406040 is an apocalyptic number.

It is an amenable number.

56406040 is an abundant number, since it is smaller than the sum of its proper divisors (70730840).

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

56406040 is a wasteful number, since it uses less digits than its factorization.

56406040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2491 (or 2487 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 56406040 is about 7510.3954622909. The cubic root of 56406040 is about 383.5086851603.

The spelling of 56406040 in words is "fifty-six million, four hundred six thousand, forty".