55628250 has 64 divisors (see below), whose sum is σ = 147049344. Its totient is φ = 13958400.

The previous prime is 55628231. The next prime is 55628273. The reversal of 55628250 is 5282655.

55628250 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon 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 31 ways as a sum of consecutive naturals, for example, 10569 + ... + 14931.

It is an arithmetic number, because the mean of its divisors is an integer number (2297646).

Almost surely, 2^55628250 is an apocalyptic number.

55628250 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 55628250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73524672).

55628250 is an abundant number, since it is smaller than the sum of its proper divisors (91421094).

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

55628250 is a wasteful number, since it uses less digits than its factorization.

55628250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4400 (or 4390 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 33.

The square root of 55628250 is about 7458.4348224007. The cubic root of 55628250 is about 381.7377703783.

Subtracting from 55628250 its reverse (5282655), we obtain a triangular number (50345595 = T₁₀₀₃₄).

The spelling of 55628250 in words is "fifty-five million, six hundred twenty-eight thousand, two hundred fifty".