56421588 has 48 divisors (see below), whose sum is σ = 137047680. Its totient is φ = 18044544.

The previous prime is 56421577. The next prime is 56421593. The reversal of 56421588 is 88512465.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68145 + ... + 68967.

It is an arithmetic number, because the mean of its divisors is an integer number (2855160).

Almost surely, 2^56421588 is an apocalyptic number.

56421588 is a gapful number since it is divisible by the number (58) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 56421588, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68523840).

56421588 is an abundant number, since it is smaller than the sum of its proper divisors (80626092).

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

56421588 is a wasteful number, since it uses less digits than its factorization.

56421588 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1056 (or 1054 counting only the distinct ones).

The product of its digits is 76800, while the sum is 39.

The square root of 56421588 is about 7511.4304895938. The cubic root of 56421588 is about 383.5439192431.

The spelling of 56421588 in words is "fifty-six million, four hundred twenty-one thousand, five hundred eighty-eight".