28868364 has 72 divisors (see below), whose sum is σ = 84328608. Its totient is φ = 8156160.

The previous prime is 28868341. The next prime is 28868377. The reversal of 28868364 is 46386882.

It is a happy number.

28868364 is a `hidden beast` number, since 288 + 6 + 8 + 364 = 666.

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, 23854 + ... + 25034.

Almost surely, 2^28868364 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 28868364, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42164304).

28868364 is an abundant number, since it is smaller than the sum of its proper divisors (55460244).

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

28868364 is a wasteful number, since it uses less digits than its factorization.

28868364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1295 (or 1290 counting only the distinct ones).

The product of its digits is 442368, while the sum is 45.

The square root of 28868364 is about 5372.9288102487. The cubic root of 28868364 is about 306.7661182381.

It can be divided in two parts, 2 and 8868364, that added together give a triangular number (8868366 = T₄₂₁₁).

The spelling of 28868364 in words is "twenty-eight million, eight hundred sixty-eight thousand, three hundred sixty-four".