56722890 has 96 divisors (see below), whose sum is σ = 161927424. Its totient is φ = 12673920.

The previous prime is 56722877. The next prime is 56722903. The reversal of 56722890 is 9822765.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (56722877) and next prime (56722903).

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 68680 + ... + 69500.

It is an arithmetic number, because the mean of its divisors is an integer number (1686744).

Almost surely, 2^56722890 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 56722890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80963712).

56722890 is an abundant number, since it is smaller than the sum of its proper divisors (105204534).

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

56722890 is a wasteful number, since it uses less digits than its factorization.

56722890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 892 (or 885 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 39.

The square root of 56722890 is about 7531.4600178186. The cubic root of 56722890 is about 384.2254399962.

The spelling of 56722890 in words is "fifty-six million, seven hundred twenty-two thousand, eight hundred ninety".