28328984 has 16 divisors (see below), whose sum is σ = 53200320. Its totient is φ = 14142240.

The previous prime is 28328941. The next prime is 28329011. The reversal of 28328984 is 48982382.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3449 + ... + 8279.

It is an arithmetic number, because the mean of its divisors is an integer number (3325020).

Almost surely, 2^28328984 is an apocalyptic number.

It is an amenable number.

28328984 is a deficient number, since it is larger than the sum of its proper divisors (24871336).

28328984 is a wasteful number, since it uses less digits than its factorization.

28328984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5570 (or 5566 counting only the distinct ones).

The product of its digits is 221184, while the sum is 44.

The square root of 28328984 is about 5322.4979098164. The cubic root of 28328984 is about 304.8435424369.

The spelling of 28328984 in words is "twenty-eight million, three hundred twenty-eight thousand, nine hundred eighty-four".