28996784 has 20 divisors (see below), whose sum is σ = 56265000. Its totient is φ = 14476800.

The previous prime is 28996783. The next prime is 28996787. The reversal of 28996784 is 48769982.

It is a super-3 number, since 3×28996784³ (a number of 23 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (28996783) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 19259 + ... + 20709.

It is an arithmetic number, because the mean of its divisors is an integer number (2813250).

Almost surely, 2^28996784 is an apocalyptic number.

It is an amenable number.

28996784 is a deficient number, since it is larger than the sum of its proper divisors (27268216).

28996784 is a wasteful number, since it uses less digits than its factorization.

28996784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2708 (or 2702 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 53.

The square root of 28996784 is about 5384.8662007519. The cubic root of 28996784 is about 307.2203251707.

The spelling of 28996784 in words is "twenty-eight million, nine hundred ninety-six thousand, seven hundred eighty-four".