28618680 has 64 divisors (see below), whose sum is σ = 87091200. Its totient is φ = 7521920.

The previous prime is 28618663. The next prime is 28618703. The reversal of 28618680 is 8681682.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6841 + ... + 10199.

It is an arithmetic number, because the mean of its divisors is an integer number (1360800).

Almost surely, 2^28618680 is an apocalyptic number.

28618680 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 28618680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43545600).

28618680 is an abundant number, since it is smaller than the sum of its proper divisors (58472520).

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

28618680 is a wasteful number, since it uses less digits than its factorization.

28618680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3444 (or 3440 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 39.

The square root of 28618680 is about 5349.6429787417. The cubic root of 28618680 is about 305.8791440376.

The spelling of 28618680 in words is "twenty-eight million, six hundred eighteen thousand, six hundred eighty".