28479272 has 8 divisors (see below), whose sum is σ = 53398650. Its totient is φ = 14239632.

The previous prime is 28479259. The next prime is 28479281. The reversal of 28479272 is 27297482.

It can be written as a sum of positive squares in only one way, i.e., 24661156 + 3818116 = 4966^2 + 1954^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×28479272² = 1622137867299968, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1779947 + ... + 1779962.

Almost surely, 2^28479272 is an apocalyptic number.

It is an amenable number.

28479272 is a deficient number, since it is larger than the sum of its proper divisors (24919378).

28479272 is a wasteful number, since it uses less digits than its factorization.

28479272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3559915 (or 3559911 counting only the distinct ones).

The product of its digits is 112896, while the sum is 41.

The square root of 28479272 is about 5336.5974178310. The cubic root of 28479272 is about 305.3816667805.

The spelling of 28479272 in words is "twenty-eight million, four hundred seventy-nine thousand, two hundred seventy-two".