28917974 has 8 divisors (see below), whose sum is σ = 43428528. Its totient is φ = 14441800.

The previous prime is 28917953. The next prime is 28918031. The reversal of 28917974 is 47971982.

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

It is a Curzon number.

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, 6377 + ... + 9924.

It is an arithmetic number, because the mean of its divisors is an integer number (5428566).

Almost surely, 2^28917974 is an apocalyptic number.

28917974 is a deficient number, since it is larger than the sum of its proper divisors (14510554).

28917974 is a wasteful number, since it uses less digits than its factorization.

28917974 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17190.

The product of its digits is 254016, while the sum is 47.

The square root of 28917974 is about 5377.5434912235. The cubic root of 28917974 is about 306.9417425274.

The spelling of 28917974 in words is "twenty-eight million, nine hundred seventeen thousand, nine hundred seventy-four".