55547628 has 12 divisors (see below), whose sum is σ = 129611160. Its totient is φ = 18515872.

The previous prime is 55547617. The next prime is 55547669. The reversal of 55547628 is 82674555.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 55547628.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2314473 + ... + 2314496.

It is an arithmetic number, because the mean of its divisors is an integer number (10800930).

Almost surely, 2^55547628 is an apocalyptic number.

It is an amenable number.

55547628 is an abundant number, since it is smaller than the sum of its proper divisors (74063532).

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

55547628 is a wasteful number, since it uses less digits than its factorization.

55547628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4628976 (or 4628974 counting only the distinct ones).

The product of its digits is 336000, while the sum is 42.

The square root of 55547628 is about 7453.0281094331. The cubic root of 55547628 is about 381.5532637496.

The spelling of 55547628 in words is "fifty-five million, five hundred forty-seven thousand, six hundred twenty-eight".