53657856 has 144 divisors (see below), whose sum is σ = 181507200. Its totient is φ = 15316992.

The previous prime is 53657819. The next prime is 53657861. The reversal of 53657856 is 65875635.

It is a tau number, because it is divible by the number of its divisors (144).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47830 + ... + 48938.

Almost surely, 2^53657856 is an apocalyptic number.

53657856 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 53657856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90753600).

53657856 is an abundant number, since it is smaller than the sum of its proper divisors (127849344).

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

53657856 is a wasteful number, since it uses less digits than its factorization.

53657856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1141 (or 1121 counting only the distinct ones).

The product of its digits is 756000, while the sum is 45.

The square root of 53657856 is about 7325.1522851064. The cubic root of 53657856 is about 377.1763370514.

The spelling of 53657856 in words is "fifty-three million, six hundred fifty-seven thousand, eight hundred fifty-six".