28509360 has 80 divisors (see below), whose sum is σ = 96422400. Its totient is φ = 6910720.

The previous prime is 28509319. The next prime is 28509373. The reversal of 28509360 is 6390582.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (33).

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, 2760 + ... + 8039.

It is an arithmetic number, because the mean of its divisors is an integer number (1205280).

Almost surely, 2^28509360 is an apocalyptic number.

28509360 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28509360 is an abundant number, since it is smaller than the sum of its proper divisors (67913040).

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

28509360 is a wasteful number, since it uses less digits than its factorization.

28509360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10826 (or 10820 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 28509360 is about 5339.4156983700. The cubic root of 28509360 is about 305.4891729193.

The spelling of 28509360 in words is "twenty-eight million, five hundred nine thousand, three hundred sixty".