56898990 has 64 divisors (see below), whose sum is σ = 153619200. Its totient is φ = 14984352.

The previous prime is 56898967. The next prime is 56898991. The reversal of 56898990 is 9989865.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56898991) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21141 + ... + 23679.

It is an arithmetic number, because the mean of its divisors is an integer number (2400300).

Almost surely, 2^56898990 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 56898990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76809600).

56898990 is an abundant number, since it is smaller than the sum of its proper divisors (96720210).

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

56898990 is a wasteful number, since it uses less digits than its factorization.

56898990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2638 (or 2632 counting only the distinct ones).

The product of its (nonzero) digits is 1399680, while the sum is 54.

The square root of 56898990 is about 7543.1419183255. The cubic root of 56898990 is about 384.6226470731.

The spelling of 56898990 in words is "fifty-six million, eight hundred ninety-eight thousand, nine hundred ninety".