28666976 has 48 divisors (see below), whose sum is σ = 61344864. Its totient is φ = 13108224.

The previous prime is 28666969. The next prime is 28666987. The reversal of 28666976 is 67966682.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56741 + ... + 57243.

It is an arithmetic number, because the mean of its divisors is an integer number (1278018).

Almost surely, 2^28666976 is an apocalyptic number.

28666976 is a gapful number since it is divisible by the number (26) 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 28666976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30672432).

28666976 is an abundant number, since it is smaller than the sum of its proper divisors (32677888).

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

28666976 is a wasteful number, since it uses less digits than its factorization.

28666976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 663 (or 655 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 50.

The square root of 28666976 is about 5354.1550220366. The cubic root of 28666976 is about 306.0511114020.

The spelling of 28666976 in words is "twenty-eight million, six hundred sixty-six thousand, nine hundred seventy-six".