28978008 has 16 divisors (see below), whose sum is σ = 72445080. Its totient is φ = 9659328.

The previous prime is 28978003. The next prime is 28978073. The reversal of 28978008 is 80087982.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28978003) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 603685 + ... + 603732.

Almost surely, 2^28978008 is an apocalyptic number.

It is an amenable number.

28978008 is an abundant number, since it is smaller than the sum of its proper divisors (43467072).

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

28978008 is a wasteful number, since it uses less digits than its factorization.

28978008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1207426 (or 1207422 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 42.

The square root of 28978008 is about 5383.1225139319. The cubic root of 28978008 is about 307.1540004095.

The spelling of 28978008 in words is "twenty-eight million, nine hundred seventy-eight thousand, eight".