28994188 has 12 divisors (see below), whose sum is σ = 50803480. Its totient is φ = 14478912.

The previous prime is 28994177. The next prime is 28994221. The reversal of 28994188 is 88149982.

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, 573 + ... + 7636.

Almost surely, 2^28994188 is an apocalyptic number.

It is an amenable number.

28994188 is a deficient number, since it is larger than the sum of its proper divisors (21809292).

28994188 is a wasteful number, since it uses less digits than its factorization.

28994188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9096 (or 9094 counting only the distinct ones).

The product of its digits is 331776, while the sum is 49.

The square root of 28994188 is about 5384.6251494417. The cubic root of 28994188 is about 307.2111567083.

The spelling of 28994188 in words is "twenty-eight million, nine hundred ninety-four thousand, one hundred eighty-eight".