28863984 has 20 divisors (see below), whose sum is σ = 74565416. Its totient is φ = 9621312.

The previous prime is 28863971. The next prime is 28864001. The reversal of 28863984 is 48936882.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (48), and also a Moran number because the ratio is a prime number: 601333 = 28863984 / (2 + 8 + 8 + 6 + 3 + 9 + 8 + 4).

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, 300619 + ... + 300714.

Almost surely, 2^28863984 is an apocalyptic number.

28863984 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28863984 is an abundant number, since it is smaller than the sum of its proper divisors (45701432).

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

28863984 is a wasteful number, since it uses less digits than its factorization.

28863984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 601344 (or 601338 counting only the distinct ones).

The product of its digits is 663552, while the sum is 48.

The square root of 28863984 is about 5372.5211958633. The cubic root of 28863984 is about 306.7506029430.

The spelling of 28863984 in words is "twenty-eight million, eight hundred sixty-three thousand, nine hundred eighty-four".