28894988 has 6 divisors (see below), whose sum is σ = 50566236. Its totient is φ = 14447492.

The previous prime is 28894967. The next prime is 28894997. The reversal of 28894988 is 88949882.

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 as a sum of consecutive naturals, namely, 3611870 + ... + 3611877.

It is an arithmetic number, because the mean of its divisors is an integer number (8427706).

Almost surely, 2^28894988 is an apocalyptic number.

It is an amenable number.

28894988 is a deficient number, since it is larger than the sum of its proper divisors (21671248).

28894988 is a wasteful number, since it uses less digits than its factorization.

28894988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7223751 (or 7223749 counting only the distinct ones).

The product of its digits is 2654208, while the sum is 56.

The square root of 28894988 is about 5375.4058451432. The cubic root of 28894988 is about 306.8603948151.

The spelling of 28894988 in words is "twenty-eight million, eight hundred ninety-four thousand, nine hundred eighty-eight".