28856508 has 48 divisors (see below), whose sum is σ = 70428960. Its totient is φ = 9184000.

The previous prime is 28856501. The next prime is 28856521. The reversal of 28856508 is 80565882.

It is a self number, because there is not a number n which added to its sum of digits gives 28856508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28856501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34738 + ... + 35558.

It is an arithmetic number, because the mean of its divisors is an integer number (1467270).

Almost surely, 2^28856508 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 28856508, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35214480).

28856508 is an abundant number, since it is smaller than the sum of its proper divisors (41572452).

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

28856508 is a wasteful number, since it uses less digits than its factorization.

28856508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 958 (or 956 counting only the distinct ones).

The product of its (nonzero) digits is 153600, while the sum is 42.

The square root of 28856508 is about 5371.8253880781. The cubic root of 28856508 is about 306.7241170460.

The spelling of 28856508 in words is "twenty-eight million, eight hundred fifty-six thousand, five hundred eight".