53687256 has 32 divisors (see below), whose sum is σ = 153392640. Its totient is φ = 15339168.

The previous prime is 53687219. The next prime is 53687279. The reversal of 53687256 is 65278635.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 159616 + ... + 159951.

It is an arithmetic number, because the mean of its divisors is an integer number (4793520).

Almost surely, 2^53687256 is an apocalyptic number.

53687256 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

53687256 is an abundant number, since it is smaller than the sum of its proper divisors (99705384).

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

53687256 is a wasteful number, since it uses less digits than its factorization.

53687256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319583 (or 319579 counting only the distinct ones).

The product of its digits is 302400, while the sum is 42.

The square root of 53687256 is about 7327.1587945124. The cubic root of 53687256 is about 377.2452114622.

The spelling of 53687256 in words is "fifty-three million, six hundred eighty-seven thousand, two hundred fifty-six".