55912728 has 64 divisors (see below), whose sum is σ = 151493760. Its totient is φ = 17127936.

The previous prime is 55912709. The next prime is 55912741. The reversal of 55912728 is 82721955.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15951 + ... + 19137.

It is an arithmetic number, because the mean of its divisors is an integer number (2367090).

Almost surely, 2^55912728 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 55912728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75746880).

55912728 is an abundant number, since it is smaller than the sum of its proper divisors (95581032).

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

55912728 is a wasteful number, since it uses less digits than its factorization.

55912728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3256 (or 3252 counting only the distinct ones).

The product of its digits is 50400, while the sum is 39.

The square root of 55912728 is about 7477.4813941594. The cubic root of 55912728 is about 382.3873887813.

The spelling of 55912728 in words is "fifty-five million, nine hundred twelve thousand, seven hundred twenty-eight".