28338660 has 288 divisors, whose sum is σ = 110073600. Its totient is φ = 6096384.

The previous prime is 28338659. The next prime is 28338683. The reversal of 28338660 is 6683382.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1666972 + ... + 1666988.

It is an arithmetic number, because the mean of its divisors is an integer number (382200).

Almost surely, 2^28338660 is an apocalyptic number.

28338660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28338660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55036800).

28338660 is an abundant number, since it is smaller than the sum of its proper divisors (81734940).

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

28338660 is a wasteful number, since it uses less digits than its factorization.

28338660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62 (or 34 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 28338660 is about 5323.4068039180. The cubic root of 28338660 is about 304.8782457682.

The spelling of 28338660 in words is "twenty-eight million, three hundred thirty-eight thousand, six hundred sixty".