55690628 has 48 divisors (see below), whose sum is σ = 115248000. Its totient is φ = 23051520.

The previous prime is 55690619. The next prime is 55690673. The reversal of 55690628 is 82609655.

It is a Harshad number since it is a multiple of its sum of digits (41).

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, 159398 + ... + 159746.

It is an arithmetic number, because the mean of its divisors is an integer number (2401000).

Almost surely, 2^55690628 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55690628, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57624000).

55690628 is an abundant number, since it is smaller than the sum of its proper divisors (59557372).

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

55690628 is a wasteful number, since it uses less digits than its factorization.

55690628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 540 (or 538 counting only the distinct ones).

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

The square root of 55690628 is about 7462.6153592424. The cubic root of 55690628 is about 381.8804026065.

The spelling of 55690628 in words is "fifty-five million, six hundred ninety thousand, six hundred twenty-eight".