28031974 has 8 divisors (see below), whose sum is σ = 42520680. Its totient is φ = 13858416.

The previous prime is 28031959. The next prime is 28031989. The reversal of 28031974 is 47913082.

It is an interprime number because it is at equal distance from previous prime (28031959) and next prime (28031989).

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 pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78564 + ... + 78919.

It is an arithmetic number, because the mean of its divisors is an integer number (5315085).

Almost surely, 2^28031974 is an apocalyptic number.

28031974 is a deficient number, since it is larger than the sum of its proper divisors (14488706).

28031974 is a wasteful number, since it uses less digits than its factorization.

28031974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157574.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 28031974 is about 5294.5230191208. The cubic root of 28031974 is about 303.7744388088.

The spelling of 28031974 in words is "twenty-eight million, thirty-one thousand, nine hundred seventy-four".