55859728 has 10 divisors (see below), whose sum is σ = 108228254. Its totient is φ = 27929856.

The previous prime is 55859723. The next prime is 55859729. The reversal of 55859728 is 82795855.

It can be written as a sum of positive squares in only one way, i.e., 43665664 + 12194064 = 6608^2 + 3492^2 .

It is not an unprimeable number, because it can be changed into a prime (55859723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1745601 + ... + 1745632.

Almost surely, 2^55859728 is an apocalyptic number.

It is an amenable number.

55859728 is a deficient number, since it is larger than the sum of its proper divisors (52368526).

55859728 is a wasteful number, since it uses less digits than its factorization.

55859728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3491241 (or 3491235 counting only the distinct ones).

The product of its digits is 1008000, while the sum is 49.

The square root of 55859728 is about 7473.9365798754. The cubic root of 55859728 is about 382.2665281753.

The spelling of 55859728 in words is "fifty-five million, eight hundred fifty-nine thousand, seven hundred twenty-eight".