28089902 has 8 divisors (see below), whose sum is σ = 42202512. Its totient is φ = 14022400.

The previous prime is 28089883. The next prime is 28089907. The reversal of 28089902 is 20998082.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28089907) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9674 + ... + 12237.

It is an arithmetic number, because the mean of its divisors is an integer number (5275314).

Almost surely, 2^28089902 is an apocalyptic number.

28089902 is a deficient number, since it is larger than the sum of its proper divisors (14112610).

28089902 is a wasteful number, since it uses less digits than its factorization.

28089902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22554.

The product of its (nonzero) digits is 20736, while the sum is 38.

The square root of 28089902 is about 5299.9907547089. The cubic root of 28089902 is about 303.9835445271.

The spelling of 28089902 in words is "twenty-eight million, eighty-nine thousand, nine hundred two".