28628272 has 20 divisors (see below), whose sum is σ = 58730616. Its totient is φ = 13472000.

The previous prime is 28628267. The next prime is 28628273. The reversal of 28628272 is 27282682.

It is not an unprimeable number, because it can be changed into a prime (28628273) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52354 + ... + 52897.

Almost surely, 2^28628272 is an apocalyptic number.

It is an amenable number.

28628272 is an abundant number, since it is smaller than the sum of its proper divisors (30102344).

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

28628272 is a wasteful number, since it uses less digits than its factorization.

28628272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105276 (or 105270 counting only the distinct ones).

The product of its digits is 43008, while the sum is 37.

The square root of 28628272 is about 5350.5394120593. The cubic root of 28628272 is about 305.9133136198.

It can be divided in two parts, 28628 and 272, that added together give a square (28900 = 170²).

The spelling of 28628272 in words is "twenty-eight million, six hundred twenty-eight thousand, two hundred seventy-two".