28716660 has 192 divisors, whose sum is σ = 104509440. Its totient is φ = 6410880.

The previous prime is 28716643. The next prime is 28716683. The reversal of 28716660 is 6661782.

It is a happy number.

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 63 ways as a sum of consecutive naturals, for example, 268327 + ... + 268433.

It is an arithmetic number, because the mean of its divisors is an integer number (544320).

Almost surely, 2^28716660 is an apocalyptic number.

28716660 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 28716660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52254720).

28716660 is an abundant number, since it is smaller than the sum of its proper divisors (75792780).

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

28716660 is a wasteful number, since it uses less digits than its factorization.

28716660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203 (or 195 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 28716660 is about 5358.7927744969. The cubic root of 28716660 is about 306.2278195792.

The spelling of 28716660 in words is "twenty-eight million, seven hundred sixteen thousand, six hundred sixty".