28977924 has 12 divisors (see below), whose sum is σ = 67615184. Its totient is φ = 9659304.

The previous prime is 28977899. The next prime is 28977929. The reversal of 28977924 is 42977982.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (28977929) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1207402 + ... + 1207425.

Almost surely, 2^28977924 is an apocalyptic number.

It is an amenable number.

28977924 is an abundant number, since it is smaller than the sum of its proper divisors (38637260).

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

28977924 is a wasteful number, since it uses less digits than its factorization.

28977924 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2414834 (or 2414832 counting only the distinct ones).

The product of its digits is 508032, while the sum is 48.

The square root of 28977924 is about 5383.1147117631. The cubic root of 28977924 is about 307.1537036217.

The spelling of 28977924 in words is "twenty-eight million, nine hundred seventy-seven thousand, nine hundred twenty-four".