28978996 has 12 divisors (see below), whose sum is σ = 50784580. Its totient is φ = 14469120.

The previous prime is 28978993. The next prime is 28979051. The reversal of 28978996 is 69987982.

It can be written as a sum of positive squares in 2 ways, for example, as 10368400 + 18610596 = 3220^2 + 4314^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 28978996.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28978991) 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, 1635 + ... + 7786.

Almost surely, 2^28978996 is an apocalyptic number.

It is an amenable number.

28978996 is a deficient number, since it is larger than the sum of its proper divisors (21805584).

28978996 is a wasteful number, since it uses less digits than its factorization.

28978996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10194 (or 10192 counting only the distinct ones).

The product of its digits is 3919104, while the sum is 58.

The square root of 28978996 is about 5383.2142814493. The cubic root of 28978996 is about 307.1574911568.

The spelling of 28978996 in words is "twenty-eight million, nine hundred seventy-eight thousand, nine hundred ninety-six".