28285660 has 24 divisors (see below), whose sum is σ = 63969696. Its totient is φ = 10443840.

The previous prime is 28285657. The next prime is 28285667. The reversal of 28285660 is 6658282.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28285667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54136 + ... + 54655.

It is an arithmetic number, because the mean of its divisors is an integer number (2665404).

Almost surely, 2^28285660 is an apocalyptic number.

28285660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28285660 is an abundant number, since it is smaller than the sum of its proper divisors (35684036).

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

28285660 is a wasteful number, since it uses less digits than its factorization.

28285660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108813 (or 108811 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 37.

The square root of 28285660 is about 5318.4264590196. The cubic root of 28285660 is about 304.6880623351.

The spelling of 28285660 in words is "twenty-eight million, two hundred eighty-five thousand, six hundred sixty".