28887272 has 16 divisors (see below), whose sum is σ = 54561060. Its totient is φ = 14337664.

The previous prime is 28887253. The next prime is 28887283. The reversal of 28887272 is 27278882.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 28879876 + 7396 = 5374^2 + 86^2 .

28887272 is a modest number, since divided by 7272 gives 2888 as remainder.

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, 12083 + ... + 14274.

Almost surely, 2^28887272 is an apocalyptic number.

It is an amenable number.

28887272 is a deficient number, since it is larger than the sum of its proper divisors (25673788).

28887272 is a wasteful number, since it uses less digits than its factorization.

28887272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26500 (or 26496 counting only the distinct ones).

The product of its digits is 200704, while the sum is 44.

The square root of 28887272 is about 5374.6880839729. The cubic root of 28887272 is about 306.8330781331.

The spelling of 28887272 in words is "twenty-eight million, eight hundred eighty-seven thousand, two hundred seventy-two".