28960520 has 32 divisors (see below), whose sum is σ = 68995800. Its totient is φ = 10902528.

The previous prime is 28960517. The next prime is 28960553. The reversal of 28960520 is 2506982.

It can be written as a sum of positive squares in 4 ways, for example, as 21659716 + 7300804 = 4654^2 + 2702^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20615 + ... + 21974.

Almost surely, 2^28960520 is an apocalyptic number.

28960520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28960520 is an abundant number, since it is smaller than the sum of its proper divisors (40035280).

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

28960520 is a wasteful number, since it uses less digits than its factorization.

28960520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42617 (or 42613 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 28960520 is about 5381.4979327321. The cubic root of 28960520 is about 307.0921996343.

The spelling of 28960520 in words is "twenty-eight million, nine hundred sixty thousand, five hundred twenty".