28003056 has 20 divisors (see below), whose sum is σ = 72341352. Its totient is φ = 9334336.

The previous prime is 28003037. The next prime is 28003069. The reversal of 28003056 is 65030082.

It is a super-2 number, since 2×28003056² = 1568342290678272, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

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, 291651 + ... + 291746.

Almost surely, 2^28003056 is an apocalyptic number.

It is an amenable number.

28003056 is an abundant number, since it is smaller than the sum of its proper divisors (44338296).

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

28003056 is a wasteful number, since it uses less digits than its factorization.

28003056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 583408 (or 583402 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 28003056 is about 5291.7913791078. The cubic root of 28003056 is about 303.6699441856.

The spelling of 28003056 in words is "twenty-eight million, three thousand, fifty-six".