28697976 has 80 divisors (see below), whose sum is σ = 81704040. Its totient is φ = 9408960.

The previous prime is 28697959. The next prime is 28697993. The reversal of 28697976 is 67979682.

It is an interprime number because it is at equal distance from previous prime (28697959) and next prime (28697993).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 43086 + ... + 43746.

Almost surely, 2^28697976 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 28697976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40852020).

28697976 is an abundant number, since it is smaller than the sum of its proper divisors (53006064).

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

28697976 is a wasteful number, since it uses less digits than its factorization.

28697976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 746 (or 733 counting only the distinct ones).

The product of its digits is 2286144, while the sum is 54.

The square root of 28697976 is about 5357.0491877525. The cubic root of 28697976 is about 306.1613912190.

The spelling of 28697976 in words is "twenty-eight million, six hundred ninety-seven thousand, nine hundred seventy-six".