28553556 has 24 divisors (see below), whose sum is σ = 66711904. Its totient is φ = 9505440.

The previous prime is 28553549. The next prime is 28553563. The reversal of 28553556 is 65535582.

It is an interprime number because it is at equal distance from previous prime (28553549) and next prime (28553563).

It is a congruent 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 7 ways as a sum of consecutive naturals, for example, 15711 + ... + 17433.

Almost surely, 2^28553556 is an apocalyptic number.

It is an amenable number.

28553556 is an abundant number, since it is smaller than the sum of its proper divisors (38158348).

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

28553556 is a wasteful number, since it uses less digits than its factorization.

28553556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3111 (or 3109 counting only the distinct ones).

The product of its digits is 180000, while the sum is 39.

The square root of 28553556 is about 5343.5527507455. The cubic root of 28553556 is about 305.6469506777.

It can be divided in two parts, 2 and 8553556, that added together give a palindrome (8553558).

The spelling of 28553556 in words is "twenty-eight million, five hundred fifty-three thousand, five hundred fifty-six".