55724856 has 96 divisors (see below), whose sum is σ = 158323200. Its totient is φ = 16315200.

The previous prime is 55724839. The next prime is 55724869. The reversal of 55724856 is 65842755.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 89715 + ... + 90333.

It is an arithmetic number, because the mean of its divisors is an integer number (1649200).

Almost surely, 2^55724856 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 55724856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79161600).

55724856 is an abundant number, since it is smaller than the sum of its proper divisors (102598344).

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

55724856 is a wasteful number, since it uses less digits than its factorization.

55724856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 681 (or 666 counting only the distinct ones).

The product of its digits is 336000, while the sum is 42.

The square root of 55724856 is about 7464.9083048622. The cubic root of 55724856 is about 381.9586223833.

The spelling of 55724856 in words is "fifty-five million, seven hundred twenty-four thousand, eight hundred fifty-six".