55287628 has 24 divisors (see below), whose sum is σ = 106827840. Its totient is φ = 24826320.

The previous prime is 55287599. The next prime is 55287643. The reversal of 55287628 is 82678255.

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, 3918 + ... + 11221.

It is an arithmetic number, because the mean of its divisors is an integer number (4451160).

Almost surely, 2^55287628 is an apocalyptic number.

It is an amenable number.

55287628 is a deficient number, since it is larger than the sum of its proper divisors (51540212).

55287628 is a wasteful number, since it uses less digits than its factorization.

55287628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15237 (or 15235 counting only the distinct ones).

The product of its digits is 268800, while the sum is 43.

The square root of 55287628 is about 7435.5650760383. The cubic root of 55287628 is about 380.9570244742.

The spelling of 55287628 in words is "fifty-five million, two hundred eighty-seven thousand, six hundred twenty-eight".