28043456 has 28 divisors (see below), whose sum is σ = 63599568. Its totient is φ = 12018432.

The previous prime is 28043441. The next prime is 28043471. The reversal of 28043456 is 65434082.

It is an interprime number because it is at equal distance from previous prime (28043441) and next prime (28043471).

It is a tau number, because it is divible by the number of its divisors (28).

It is a Harshad number since it is a multiple of its sum of digits (32).

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, 30851 + ... + 31746.

Almost surely, 2^28043456 is an apocalyptic number.

It is an amenable number.

28043456 is an abundant number, since it is smaller than the sum of its proper divisors (35556112).

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

28043456 is an equidigital number, since it uses as much as digits as its factorization.

28043456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62616 (or 62606 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 32.

The square root of 28043456 is about 5295.6072361911. The cubic root of 28043456 is about 303.8159088577.

The spelling of 28043456 in words is "twenty-eight million, forty-three thousand, four hundred fifty-six".