28979216 has 20 divisors (see below), whose sum is σ = 64168512. Its totient is φ = 12419616.

The previous prime is 28979191. The next prime is 28979219. The reversal of 28979216 is 61297982.

It is a happy number.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (28979219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 129260 + ... + 129483.

Almost surely, 2^28979216 is an apocalyptic number.

It is an amenable number.

28979216 is an abundant number, since it is smaller than the sum of its proper divisors (35189296).

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

28979216 is a wasteful number, since it uses less digits than its factorization.

28979216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258758 (or 258752 counting only the distinct ones).

The product of its digits is 108864, while the sum is 44.

The square root of 28979216 is about 5383.2347152990. The cubic root of 28979216 is about 307.1582684379.

The spelling of 28979216 in words is "twenty-eight million, nine hundred seventy-nine thousand, two hundred sixteen".