28315056 has 160 divisors (see below), whose sum is σ = 93708288. Its totient is φ = 7153920.

The previous prime is 28315043. The next prime is 28315069. The reversal of 28315056 is 65051382.

It is an interprime number because it is at equal distance from previous prime (28315043) and next prime (28315069).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 173631 + ... + 173793.

Almost surely, 2^28315056 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28315056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46854144).

28315056 is an abundant number, since it is smaller than the sum of its proper divisors (65393232).

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

28315056 is a wasteful number, since it uses less digits than its factorization.

28315056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239 (or 233 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 28315056 is about 5321.1893407395. The cubic root of 28315056 is about 304.7935752740.

It can be divided in two parts, 2831 and 5056, that added together give a palindrome (7887).

The spelling of 28315056 in words is "twenty-eight million, three hundred fifteen thousand, fifty-six".