28994636 has 12 divisors (see below), whose sum is σ = 55353480. Its totient is φ = 13179360.

The previous prime is 28994621. The next prime is 28994653. The reversal of 28994636 is 63649982.

It is a hoax number, since the sum of its digits (47) coincides with the sum of the digits of its distinct prime factors.

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 3 ways as a sum of consecutive naturals, for example, 329441 + ... + 329528.

It is an arithmetic number, because the mean of its divisors is an integer number (4612790).

Almost surely, 2^28994636 is an apocalyptic number.

It is an amenable number.

28994636 is a deficient number, since it is larger than the sum of its proper divisors (26358844).

28994636 is a wasteful number, since it uses less digits than its factorization.

28994636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 658984 (or 658982 counting only the distinct ones).

The product of its digits is 559872, while the sum is 47.

The square root of 28994636 is about 5384.6667492056. Note that the first 3 decimals coincide. The cubic root of 28994636 is about 307.2127389782.

It can be divided in two parts, 289946 and 36, that added together give a palindrome (289982).

The spelling of 28994636 in words is "twenty-eight million, nine hundred ninety-four thousand, six hundred thirty-six".