28994985 has 24 divisors (see below), whose sum is σ = 50458824. Its totient is φ = 15402240.

The previous prime is 28994963. The next prime is 28994993. The reversal of 28994985 is 58949982.

It can be written as a sum of positive squares in 4 ways, for example, as 2585664 + 26409321 = 1608^2 + 5139^2 .

It is not a de Polignac number, because 28994985 - 2⁶ = 28994921 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11499 + ... + 13791.

It is an arithmetic number, because the mean of its divisors is an integer number (2102451).

Almost surely, 2^28994985 is an apocalyptic number.

It is an amenable number.

28994985 is a deficient number, since it is larger than the sum of its proper divisors (21463839).

28994985 is a wasteful number, since it uses less digits than its factorization.

28994985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2585 (or 2582 counting only the distinct ones).

The product of its digits is 1866240, while the sum is 54.

The square root of 28994985 is about 5384.6991559418. The cubic root of 28994985 is about 307.2139715834.

The spelling of 28994985 in words is "twenty-eight million, nine hundred ninety-four thousand, nine hundred eighty-five".