28316660 has 12 divisors (see below), whose sum is σ = 59465028. Its totient is φ = 11326656.

The previous prime is 28316653. The next prime is 28316689. The reversal of 28316660 is 6661382.

It can be written as a sum of positive squares in 2 ways, for example, as 21325924 + 6990736 = 4618^2 + 2644^2 .

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 707897 + ... + 707936.

It is an arithmetic number, because the mean of its divisors is an integer number (4955419).

Almost surely, 2^28316660 is an apocalyptic number.

28316660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28316660 is an abundant number, since it is smaller than the sum of its proper divisors (31148368).

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

28316660 is a wasteful number, since it uses less digits than its factorization.

28316660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1415842 (or 1415840 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 28316660 is about 5321.3400567902. The cubic root of 28316660 is about 304.7993305120.

The spelling of 28316660 in words is "twenty-eight million, three hundred sixteen thousand, six hundred sixty".