28447016 has 24 divisors (see below), whose sum is σ = 57551130. Its totient is φ = 13104288.

The previous prime is 28447007. The next prime is 28447033. The reversal of 28447016 is 61074482.

It can be written as a sum of positive squares in only one way, i.e., 27352900 + 1094116 = 5230^2 + 1046^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 54131 + ... + 54653.

Almost surely, 2^28447016 is an apocalyptic number.

28447016 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

28447016 is an abundant number, since it is smaller than the sum of its proper divisors (29104114).

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

28447016 is an equidigital number, since it uses as much as digits as its factorization.

28447016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1065 (or 538 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 32.

The square root of 28447016 is about 5333.5744112181. The cubic root of 28447016 is about 305.2663301212.

The spelling of 28447016 in words is "twenty-eight million, four hundred forty-seven thousand, sixteen".