56781284 has 12 divisors (see below), whose sum is σ = 113562624. Its totient is φ = 24334824.

The previous prime is 56781281. The next prime is 56781313. The reversal of 56781284 is 48218765.

56781284 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

56781284 is an admirable number.

It is a super-2 number, since 2×56781284² = 6448228425377312, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (56781281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1013924 + ... + 1013979.

It is an arithmetic number, because the mean of its divisors is an integer number (9463552).

Almost surely, 2^56781284 is an apocalyptic number.

It is an amenable number.

56781284 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

56781284 is a wasteful number, since it uses less digits than its factorization.

56781284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2027914 (or 2027912 counting only the distinct ones).

The product of its digits is 107520, while the sum is 41.

The square root of 56781284 is about 7535.3356925886. The cubic root of 56781284 is about 384.3572431394.

The spelling of 56781284 in words is "fifty-six million, seven hundred eighty-one thousand, two hundred eighty-four".