28724984 has 8 divisors (see below), whose sum is σ = 53859360. Its totient is φ = 14362488.

The previous prime is 28724981. The next prime is 28725029. The reversal of 28724984 is 48942782.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28724981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1795304 + ... + 1795319.

It is an arithmetic number, because the mean of its divisors is an integer number (6732420).

Almost surely, 2^28724984 is an apocalyptic number.

It is an amenable number.

28724984 is a deficient number, since it is larger than the sum of its proper divisors (25134376).

28724984 is a wasteful number, since it uses less digits than its factorization.

28724984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3590629 (or 3590625 counting only the distinct ones).

The product of its digits is 258048, while the sum is 44.

The square root of 28724984 is about 5359.5693856876. The cubic root of 28724984 is about 306.2574051243.

The spelling of 28724984 in words is "twenty-eight million, seven hundred twenty-four thousand, nine hundred eighty-four".