28889974 has 8 divisors (see below), whose sum is σ = 44829360. Its totient is φ = 13946856.

The previous prime is 28889963. The next prime is 28889989. The reversal of 28889974 is 47998882.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 248994 + ... + 249109.

It is an arithmetic number, because the mean of its divisors is an integer number (5603670).

Almost surely, 2^28889974 is an apocalyptic number.

28889974 is a deficient number, since it is larger than the sum of its proper divisors (15939386).

28889974 is a wasteful number, since it uses less digits than its factorization.

28889974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 498134.

The product of its digits is 2322432, while the sum is 55.

The square root of 28889974 is about 5374.9394415193. The cubic root of 28889974 is about 306.8426444816.

The spelling of 28889974 in words is "twenty-eight million, eight hundred eighty-nine thousand, nine hundred seventy-four".