55639128 has 16 divisors (see below), whose sum is σ = 139097880. Its totient is φ = 18546368.

The previous prime is 55639127. The next prime is 55639217. The reversal of 55639128 is 82193655.

55639128 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55639127) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1159125 + ... + 1159172.

Almost surely, 2^55639128 is an apocalyptic number.

It is an amenable number.

55639128 is an abundant number, since it is smaller than the sum of its proper divisors (83458752).

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

55639128 is a wasteful number, since it uses less digits than its factorization.

55639128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2318306 (or 2318302 counting only the distinct ones).

The product of its digits is 64800, while the sum is 39.

The square root of 55639128 is about 7459.1640282273. The cubic root of 55639128 is about 381.7626514584.

The spelling of 55639128 in words is "fifty-five million, six hundred thirty-nine thousand, one hundred twenty-eight".