55487028 has 48 divisors (see below), whose sum is σ = 133410816. Its totient is φ = 17939040.

The previous prime is 55486999. The next prime is 55487051. The reversal of 55487028 is 82078455.

55487028 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its 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 (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 98275 + ... + 98837.

It is an arithmetic number, because the mean of its divisors is an integer number (2779392).

Almost surely, 2^55487028 is an apocalyptic number.

It is an amenable number.

55487028 is an abundant number, since it is smaller than the sum of its proper divisors (77923788).

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

55487028 is a wasteful number, since it uses less digits than its factorization.

55487028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 804 (or 802 counting only the distinct ones).

The product of its (nonzero) digits is 89600, while the sum is 39.

The square root of 55487028 is about 7448.9615383622. The cubic root of 55487028 is about 381.4144606952.

The spelling of 55487028 in words is "fifty-five million, four hundred eighty-seven thousand, twenty-eight".