28273792 has 16 divisors (see below), whose sum is σ = 56326950. Its totient is φ = 14136832.

The previous prime is 28273769. The next prime is 28273841. The reversal of 28273792 is 29737282.

It can be written as a sum of positive squares in only one way, i.e., 28132416 + 141376 = 5304^2 + 376^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110317 + ... + 110572.

Almost surely, 2^28273792 is an apocalyptic number.

It is an amenable number.

28273792 is a deficient number, since it is larger than the sum of its proper divisors (28053158).

28273792 is an equidigital number, since it uses as much as digits as its factorization.

28273792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220903 (or 220891 counting only the distinct ones).

The product of its digits is 84672, while the sum is 40.

The square root of 28273792 is about 5317.3105984134. The cubic root of 28273792 is about 304.6454430506.

The spelling of 28273792 in words is "twenty-eight million, two hundred seventy-three thousand, seven hundred ninety-two".