55689620 has 48 divisors (see below), whose sum is σ = 141523200. Its totient is φ = 17969664.

The previous prime is 55689619. The next prime is 55689643. The reversal of 55689620 is 2698655.

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, 9320 + ... + 14079.

It is an arithmetic number, because the mean of its divisors is an integer number (2948400).

Almost surely, 2^55689620 is an apocalyptic number.

It is an amenable number.

55689620 is an abundant number, since it is smaller than the sum of its proper divisors (85833580).

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

55689620 is a wasteful number, since it uses less digits than its factorization.

55689620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23432 (or 23430 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 41.

The square root of 55689620 is about 7462.5478222923. The cubic root of 55689620 is about 381.8780985817.

The spelling of 55689620 in words is "fifty-five million, six hundred eighty-nine thousand, six hundred twenty".