56491648 has 32 divisors (see below), whose sum is σ = 113602500. Its totient is φ = 27979776.

The previous prime is 56491627. The next prime is 56491651. The reversal of 56491648 is 84619465.

It can be written as a sum of positive squares in 2 ways, for example, as 56430144 + 61504 = 7512^2 + 248^2 .

It is a tau number, because it is divible by the number of its divisors (32).

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, 11928 + ... + 15976.

Almost surely, 2^56491648 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 56491648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56801250).

56491648 is an abundant number, since it is smaller than the sum of its proper divisors (57110852).

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

56491648 is a wasteful number, since it uses less digits than its factorization.

56491648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4172 (or 4160 counting only the distinct ones).

The product of its digits is 207360, while the sum is 43.

The square root of 56491648 is about 7516.0926018777. The cubic root of 56491648 is about 383.7026053858.

The spelling of 56491648 in words is "fifty-six million, four hundred ninety-one thousand, six hundred forty-eight".