28517976 has 96 divisors (see below), whose sum is σ = 85419360. Its totient is φ = 8549376.

The previous prime is 28517971. The next prime is 28517989. The reversal of 28517976 is 67971582.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28517971) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27646 + ... + 28658.

It is an arithmetic number, because the mean of its divisors is an integer number (889785).

Almost surely, 2^28517976 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28517976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42709680).

28517976 is an abundant number, since it is smaller than the sum of its proper divisors (56901384).

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

28517976 is a wasteful number, since it uses less digits than its factorization.

28517976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1065 (or 1058 counting only the distinct ones).

The product of its digits is 211680, while the sum is 45.

The square root of 28517976 is about 5340.2224672761. Note that the first 3 decimals coincide. The cubic root of 28517976 is about 305.5199444461.

The spelling of 28517976 in words is "twenty-eight million, five hundred seventeen thousand, nine hundred seventy-six".