56487780 has 144 divisors (see below), whose sum is σ = 181621440. Its totient is φ = 14732928.

The previous prime is 56487757. The next prime is 56487799. The reversal of 56487780 is 8778465.

56487780 is a `hidden beast` number, since 564 + 8 + 7 + 7 + 80 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 286642 + ... + 286838.

It is an arithmetic number, because the mean of its divisors is an integer number (1261260).

Almost surely, 2^56487780 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 56487780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90810720).

56487780 is an abundant number, since it is smaller than the sum of its proper divisors (125133660).

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

56487780 is a wasteful number, since it uses less digits than its factorization.

56487780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280 (or 266 counting only the distinct ones).

The product of its (nonzero) digits is 376320, while the sum is 45.

The square root of 56487780 is about 7515.8352829210. The cubic root of 56487780 is about 383.6938477753.

The spelling of 56487780 in words is "fifty-six million, four hundred eighty-seven thousand, seven hundred eighty".