28659680 has 48 divisors (see below), whose sum is σ = 77384160. Its totient is φ = 9825792.

The previous prime is 28659677. The next prime is 28659713. The reversal of 28659680 is 8695682.

It is a happy number.

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, 11675 + ... + 13914.

It is an arithmetic number, because the mean of its divisors is an integer number (1612170).

Almost surely, 2^28659680 is an apocalyptic number.

28659680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28659680 is an abundant number, since it is smaller than the sum of its proper divisors (48724480).

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

28659680 is a wasteful number, since it uses less digits than its factorization.

28659680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25611 (or 25603 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 44.

The square root of 28659680 is about 5353.4736386761. The cubic root of 28659680 is about 306.0251449569.

The spelling of 28659680 in words is "twenty-eight million, six hundred fifty-nine thousand, six hundred eighty".