28487456 has 24 divisors (see below), whose sum is σ = 57455244. Its totient is φ = 13895680.

The previous prime is 28487449. The next prime is 28487471. The reversal of 28487456 is 65478482.

It can be written as a sum of positive squares in 2 ways, for example, as 24010000 + 4477456 = 4900^2 + 2116^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9545 + ... + 12168.

Almost surely, 2^28487456 is an apocalyptic number.

It is an amenable number.

28487456 is an abundant number, since it is smaller than the sum of its proper divisors (28967788).

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

28487456 is a wasteful number, since it uses less digits than its factorization.

28487456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21764 (or 21756 counting only the distinct ones).

The product of its digits is 430080, while the sum is 44.

The square root of 28487456 is about 5337.3641434701. The cubic root of 28487456 is about 305.4109161729.

The spelling of 28487456 in words is "twenty-eight million, four hundred eighty-seven thousand, four hundred fifty-six".