28711056 has 40 divisors (see below), whose sum is σ = 80914464. Its totient is φ = 8700160.

The previous prime is 28711043. The next prime is 28711069. The reversal of 28711056 is 65011782.

It is an interprime number because it is at equal distance from previous prime (28711043) and next prime (28711069).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26661 + ... + 27716.

Almost surely, 2^28711056 is an apocalyptic number.

It is an amenable number.

28711056 is an abundant number, since it is smaller than the sum of its proper divisors (52203408).

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

28711056 is a wasteful number, since it uses less digits than its factorization.

28711056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54399 (or 54393 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 30.

The square root of 28711056 is about 5358.2698700233. The cubic root of 28711056 is about 306.2078983634.

The spelling of 28711056 in words is "twenty-eight million, seven hundred eleven thousand, fifty-six".