28978968 has 32 divisors (see below), whose sum is σ = 72722160. Its totient is φ = 9623040.

The previous prime is 28978949. The next prime is 28978973. The reversal of 28978968 is 86987982.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4596 + ... + 8892.

Almost surely, 2^28978968 is an apocalyptic number.

It is an amenable number.

28978968 is an abundant number, since it is smaller than the sum of its proper divisors (43743192).

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

28978968 is a wasteful number, since it uses less digits than its factorization.

28978968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4587 (or 4583 counting only the distinct ones).

The product of its digits is 3483648, while the sum is 57.

The square root of 28978968 is about 5383.2116807720. The cubic root of 28978968 is about 307.1573922298.

The spelling of 28978968 in words is "twenty-eight million, nine hundred seventy-eight thousand, nine hundred sixty-eight".