28759568 has 40 divisors (see below), whose sum is σ = 60043776. Its totient is φ = 13305600.

The previous prime is 28759553. The next prime is 28759589. The reversal of 28759568 is 86595782.

It is a super-2 number, since 2×28759568² = 1654225503093248, which contains 22 as substring.

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, 10148 + ... + 12668.

Almost surely, 2^28759568 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 28759568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30021888).

28759568 is an abundant number, since it is smaller than the sum of its proper divisors (31284208).

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

28759568 is a wasteful number, since it uses less digits than its factorization.

28759568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2583 (or 2577 counting only the distinct ones).

The product of its digits is 1209600, while the sum is 50.

The square root of 28759568 is about 5362.7947937619. The cubic root of 28759568 is about 306.3802640066.

The spelling of 28759568 in words is "twenty-eight million, seven hundred fifty-nine thousand, five hundred sixty-eight".