28013456 has 20 divisors (see below), whose sum is σ = 54786672. Its totient is φ = 13874976.

The previous prime is 28013441. The next prime is 28013497. The reversal of 28013456 is 65431082.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6470 + ... + 9893.

Almost surely, 2^28013456 is an apocalyptic number.

It is an amenable number.

28013456 is a deficient number, since it is larger than the sum of its proper divisors (26773216).

28013456 is a wasteful number, since it uses less digits than its factorization.

28013456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16478 (or 16472 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 28013456 is about 5292.7739418947. The cubic root of 28013456 is about 303.7075326608.

The spelling of 28013456 in words is "twenty-eight million, thirteen thousand, four hundred fifty-six".