28730272 has 24 divisors (see below), whose sum is σ = 59891076. Its totient is φ = 13519872.

The previous prime is 28730267. The next prime is 28730281. The reversal of 28730272 is 27203782.

It can be written as a sum of positive squares in 2 ways, for example, as 27081616 + 1648656 = 5204^2 + 1284^2 .

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, 25863 + ... + 26950.

Almost surely, 2^28730272 is an apocalyptic number.

It is an amenable number.

28730272 is an abundant number, since it is smaller than the sum of its proper divisors (31160804).

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

28730272 is a wasteful number, since it uses less digits than its factorization.

28730272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52840 (or 52832 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 31.

The square root of 28730272 is about 5360.0626862006. The cubic root of 28730272 is about 306.2761970093.

The spelling of 28730272 in words is "twenty-eight million, seven hundred thirty thousand, two hundred seventy-two".