28817136 has 60 divisors (see below), whose sum is σ = 81041688. Its totient is φ = 9558912.

The previous prime is 28817101. The next prime is 28817177. The reversal of 28817136 is 63171882.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

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

It is a self number, because there is not a number n which added to its sum of digits gives 28817136.

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, 41851 + ... + 42533.

Almost surely, 2^28817136 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 28817136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40520844).

28817136 is an abundant number, since it is smaller than the sum of its proper divisors (52224552).

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

28817136 is a wasteful number, since it uses less digits than its factorization.

28817136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 990 (or 981 counting only the distinct ones).

The product of its digits is 16128, while the sum is 36.

The square root of 28817136 is about 5368.1594611189. The cubic root of 28817136 is about 306.5845547856.

It can be divided in two parts, 288 and 17136, that added together give a square (17424 = 132²).

The spelling of 28817136 in words is "twenty-eight million, eight hundred seventeen thousand, one hundred thirty-six".