28796520 has 64 divisors (see below), whose sum is σ = 89187840. Its totient is φ = 7430400.

The previous prime is 28796519. The next prime is 28796563. The reversal of 28796520 is 2569782.

It is a happy number.

It is a super-2 number, since 2×28796520² = 1658479128220800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 151 + ... + 7590.

It is an arithmetic number, because the mean of its divisors is an integer number (1393560).

Almost surely, 2^28796520 is an apocalyptic number.

28796520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28796520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44593920).

28796520 is an abundant number, since it is smaller than the sum of its proper divisors (60391320).

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

28796520 is a wasteful number, since it uses less digits than its factorization.

28796520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7786 (or 7782 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 39.

The square root of 28796520 is about 5366.2389063477. The cubic root of 28796520 is about 306.5114263637.

The spelling of 28796520 in words is "twenty-eight million, seven hundred ninety-six thousand, five hundred twenty".