28455804 has 72 divisors (see below), whose sum is σ = 79405872. Its totient is φ = 8536320.

The previous prime is 28455743. The next prime is 28455839. The reversal of 28455804 is 40855482.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18447 + ... + 19929.

Almost surely, 2^28455804 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28455804, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39702936).

28455804 is an abundant number, since it is smaller than the sum of its proper divisors (50950068).

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

28455804 is a wasteful number, since it uses less digits than its factorization.

28455804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1547 (or 1542 counting only the distinct ones).

The product of its (nonzero) digits is 51200, while the sum is 36.

The square root of 28455804 is about 5334.3981853626. The cubic root of 28455804 is about 305.2977617051.

It can be divided in two parts, 2845 and 5804, that added together give a square (8649 = 93²).

The spelling of 28455804 in words is "twenty-eight million, four hundred fifty-five thousand, eight hundred four".