28972308 has 24 divisors (see below), whose sum is σ = 67980640. Its totient is φ = 9603360.

The previous prime is 28972271. The next prime is 28972319. The reversal of 28972308 is 80327982.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4498 + ... + 8841.

Almost surely, 2^28972308 is an apocalyptic number.

It is an amenable number.

28972308 is an abundant number, since it is smaller than the sum of its proper divisors (39008332).

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

28972308 is a wasteful number, since it uses less digits than its factorization.

28972308 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13527 (or 13525 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 39.

The square root of 28972308 is about 5382.5930553963. The cubic root of 28972308 is about 307.1338599337.

The spelling of 28972308 in words is "twenty-eight million, nine hundred seventy-two thousand, three hundred eight".