28279072 has 12 divisors (see below), whose sum is σ = 55674486. Its totient is φ = 14139520.

The previous prime is 28279067. The next prime is 28279081. The reversal of 28279072 is 27097282.

It can be written as a sum of positive squares in only one way, i.e., 14470416 + 13808656 = 3804^2 + 3716^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 441829 + ... + 441892.

Almost surely, 2^28279072 is an apocalyptic number.

It is an amenable number.

28279072 is a deficient number, since it is larger than the sum of its proper divisors (27395414).

28279072 is an equidigital number, since it uses as much as digits as its factorization.

28279072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 883731 (or 883723 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 37.

The square root of 28279072 is about 5317.8070668275. The cubic root of 28279072 is about 304.6644055798.

The spelling of 28279072 in words is "twenty-eight million, two hundred seventy-nine thousand, seventy-two".