28375272 has 40 divisors (see below), whose sum is σ = 79478850. Its totient is φ = 9458208.

The previous prime is 28375201. The next prime is 28375279. The reversal of 28375272 is 27257382.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 19766916 + 8608356 = 4446^2 + 2934^2 .

It is a super-2 number, since 2×28375272² = 1610312122147968, which contains 22 as substring.

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 not an unprimeable number, because it can be changed into a prime (28375279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 21247 + ... + 22542.

Almost surely, 2^28375272 is an apocalyptic number.

It is an amenable number.

28375272 is an abundant number, since it is smaller than the sum of its proper divisors (51103578).

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

28375272 is a wasteful number, since it uses less digits than its factorization.

28375272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43807 (or 43794 counting only the distinct ones).

The product of its digits is 47040, while the sum is 36.

The square root of 28375272 is about 5326.8444692895. The cubic root of 28375272 is about 305.0094846105.

The spelling of 28375272 in words is "twenty-eight million, three hundred seventy-five thousand, two hundred seventy-two".