56617540 has 36 divisors (see below), whose sum is σ = 138310956. Its totient is φ = 19411392.

The previous prime is 56617529. The next prime is 56617571. The reversal of 56617540 is 4571665.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 8398404 + 48219136 = 2898^2 + 6944^2 .

It is a junction number, because it is equal to n+sod(n) for n = 56617496 and 56617505.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27907 + ... + 29866.

It is an arithmetic number, because the mean of its divisors is an integer number (3841971).

Almost surely, 2^56617540 is an apocalyptic number.

It is an amenable number.

56617540 is an abundant number, since it is smaller than the sum of its proper divisors (81693416).

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

56617540 is a wasteful number, since it uses less digits than its factorization.

56617540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57796 (or 57787 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 34.

The square root of 56617540 is about 7524.4627715206. The cubic root of 56617540 is about 383.9874218247.

The spelling of 56617540 in words is "fifty-six million, six hundred seventeen thousand, five hundred forty".