28264728 has 16 divisors (see below), whose sum is σ = 70661880. Its totient is φ = 9421568.

The previous prime is 28264697. The next prime is 28264751. The reversal of 28264728 is 82746282.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 588825 + ... + 588872.

Almost surely, 2^28264728 is an apocalyptic number.

It is an amenable number.

28264728 is an abundant number, since it is smaller than the sum of its proper divisors (42397152).

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

28264728 is a wasteful number, since it uses less digits than its factorization.

28264728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1177706 (or 1177702 counting only the distinct ones).

The product of its digits is 86016, while the sum is 39.

The square root of 28264728 is about 5316.4582195292. The cubic root of 28264728 is about 304.6128852031.

The spelling of 28264728 in words is "twenty-eight million, two hundred sixty-four thousand, seven hundred twenty-eight".