28553745 has 16 divisors (see below), whose sum is σ = 49839552. Its totient is φ = 13844160.

The previous prime is 28553737. The next prime is 28553773. The reversal of 28553745 is 54735582.

It is not a de Polignac number, because 28553745 - 2³ = 28553737 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 86362 + ... + 86691.

It is an arithmetic number, because the mean of its divisors is an integer number (3114972).

Almost surely, 2^28553745 is an apocalyptic number.

It is an amenable number.

28553745 is a deficient number, since it is larger than the sum of its proper divisors (21285807).

28553745 is a wasteful number, since it uses less digits than its factorization.

28553745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173072.

The product of its digits is 168000, while the sum is 39.

The square root of 28553745 is about 5343.5704355796. The cubic root of 28553745 is about 305.6476250496.

It can be divided in two parts, 285537 and 45, that added together give a palindrome (285582).

The spelling of 28553745 in words is "twenty-eight million, five hundred fifty-three thousand, seven hundred forty-five".