28518804 has 120 divisors (see below), whose sum is σ = 80498880. Its totient is φ = 8781696.

The previous prime is 28518799. The next prime is 28518811. The reversal of 28518804 is 40881582.

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 39 ways as a sum of consecutive naturals, for example, 320392 + ... + 320480.

It is an arithmetic number, because the mean of its divisors is an integer number (670824).

Almost surely, 2^28518804 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 28518804, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40249440).

28518804 is an abundant number, since it is smaller than the sum of its proper divisors (51980076).

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

28518804 is a wasteful number, since it uses less digits than its factorization.

28518804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171 (or 160 counting only the distinct ones).

The product of its (nonzero) digits is 20480, while the sum is 36.

The square root of 28518804 is about 5340.2999915735. The cubic root of 28518804 is about 305.5229012720.

The spelling of 28518804 in words is "twenty-eight million, five hundred eighteen thousand, eight hundred four".