56771280 has 100 divisors (see below), whose sum is σ = 197197572. Its totient is φ = 15137280.

The previous prime is 56771257. The next prime is 56771303. The reversal of 56771280 is 8217765.

56771280 is a `hidden beast` number, since 567 + 7 + 12 + 80 = 666.

It is an interprime number because it is at equal distance from previous prime (56771257) and next prime (56771303).

It can be written as a sum of positive squares in 2 ways, for example, as 11451456 + 45319824 = 3384^2 + 6732^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2100 + ... + 10860.

Almost surely, 2^56771280 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 56771280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98598786).

56771280 is an abundant number, since it is smaller than the sum of its proper divisors (140426292).

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

56771280 is a wasteful number, since it uses less digits than its factorization.

56771280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8786 (or 8771 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 36.

The square root of 56771280 is about 7534.6718574866. The cubic root of 56771280 is about 384.3346691771.

The spelling of 56771280 in words is "fifty-six million, seven hundred seventy-one thousand, two hundred eighty".