28813456 has 20 divisors (see below), whose sum is σ = 63801472. Its totient is φ = 12348576.

The previous prime is 28813439. The next prime is 28813489. The reversal of 28813456 is 65431882.

It is a happy number.

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, 128520 + ... + 128743.

Almost surely, 2^28813456 is an apocalyptic number.

It is an amenable number.

28813456 is an abundant number, since it is smaller than the sum of its proper divisors (34988016).

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

28813456 is a wasteful number, since it uses less digits than its factorization.

28813456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257278 (or 257272 counting only the distinct ones).

The product of its digits is 46080, while the sum is 37.

The square root of 28813456 is about 5367.8166883753. The cubic root of 28813456 is about 306.5715037640.

The spelling of 28813456 in words is "twenty-eight million, eight hundred thirteen thousand, four hundred fifty-six".