28346660 has 24 divisors (see below), whose sum is σ = 60121656. Its totient is φ = 11225600.

The previous prime is 28346641. The next prime is 28346663. The reversal of 28346660 is 6664382.

It can be written as a sum of positive squares in 4 ways, for example, as 4218916 + 24127744 = 2054^2 + 4912^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 28346660.

It is not an unprimeable number, because it can be changed into a prime (28346663) 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, 4997 + ... + 9036.

It is an arithmetic number, because the mean of its divisors is an integer number (2505069).

Almost surely, 2^28346660 is an apocalyptic number.

28346660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28346660 is an abundant number, since it is smaller than the sum of its proper divisors (31774996).

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

28346660 is a wasteful number, since it uses less digits than its factorization.

28346660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14143 (or 14141 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 35.

The square root of 28346660 is about 5324.1581494167. The cubic root of 28346660 is about 304.9069320986.

The spelling of 28346660 in words is "twenty-eight million, three hundred forty-six thousand, six hundred sixty".