28553550 has 24 divisors (see below), whose sum is σ = 70813176. Its totient is φ = 7614240.

The previous prime is 28553549. The next prime is 28553563. The reversal of 28553550 is 5535582.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 95029 + ... + 95328.

It is an arithmetic number, because the mean of its divisors is an integer number (2950549).

Almost surely, 2^28553550 is an apocalyptic number.

28553550 is an abundant number, since it is smaller than the sum of its proper divisors (42259626).

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

28553550 is a wasteful number, since it uses less digits than its factorization.

28553550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190372 (or 190367 counting only the distinct ones).

The product of its (nonzero) digits is 30000, while the sum is 33.

The square root of 28553550 is about 5343.5521893213. The cubic root of 28553550 is about 305.6469292690.

It can be divided in two parts, 285 and 53550, that added together give a palindrome (53835).

The spelling of 28553550 in words is "twenty-eight million, five hundred fifty-three thousand, five hundred fifty".