28449088 has 14 divisors (see below), whose sum is σ = 56453786. Its totient is φ = 14224512.

The previous prime is 28449077. The next prime is 28449097. The reversal of 28449088 is 88094482.

It can be written as a sum of positive squares in only one way, i.e., 28387584 + 61504 = 5328^2 + 248^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222195 + ... + 222322.

Almost surely, 2^28449088 is an apocalyptic number.

It is an amenable number.

28449088 is a deficient number, since it is larger than the sum of its proper divisors (28004698).

28449088 is an equidigital number, since it uses as much as digits as its factorization.

28449088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444529 (or 444519 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 43.

The square root of 28449088 is about 5333.7686489011. The cubic root of 28449088 is about 305.2737415193.

The spelling of 28449088 in words is "twenty-eight million, four hundred forty-nine thousand, eighty-eight".