28979928 has 48 divisors (see below), whose sum is σ = 79606800. Its totient is φ = 9522240.

The previous prime is 28979897. The next prime is 28979957. The reversal of 28979928 is 82997982.

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 11 ways as a sum of consecutive naturals, for example, 2278 + ... + 7946.

It is an arithmetic number, because the mean of its divisors is an integer number (1658475).

Almost surely, 2^28979928 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28979928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39803400).

28979928 is an abundant number, since it is smaller than the sum of its proper divisors (50626872).

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

28979928 is a wasteful number, since it uses less digits than its factorization.

28979928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5752 (or 5745 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 54.

The square root of 28979928 is about 5383.3008461352. The cubic root of 28979928 is about 307.1607839752.

The spelling of 28979928 in words is "twenty-eight million, nine hundred seventy-nine thousand, nine hundred twenty-eight".