28999560 has 32 divisors (see below), whose sum is σ = 86999040. Its totient is φ = 7733184.

The previous prime is 28999549. The next prime is 28999577. The reversal of 28999560 is 6599982.

It is a congruent number.

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, 120712 + ... + 120951.

It is an arithmetic number, because the mean of its divisors is an integer number (2718720).

Almost surely, 2^28999560 is an apocalyptic number.

28999560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28999560 is an abundant number, since it is smaller than the sum of its proper divisors (57999480).

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

28999560 is a wasteful number, since it uses less digits than its factorization.

28999560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241677 (or 241673 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 48.

The square root of 28999560 is about 5385.1239540051. The cubic root of 28999560 is about 307.2301287453.

The spelling of 28999560 in words is "twenty-eight million, nine hundred ninety-nine thousand, five hundred sixty".