28517974 has 8 divisors (see below), whose sum is σ = 45028440. Its totient is φ = 13508496.

The previous prime is 28517971. The next prime is 28517989. The reversal of 28517974 is 47971582.

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

It is a self number, because there is not a number n which added to its sum of digits gives 28517974.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28517971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 375199 + ... + 375274.

It is an arithmetic number, because the mean of its divisors is an integer number (5628555).

Almost surely, 2^28517974 is an apocalyptic number.

28517974 is a deficient number, since it is larger than the sum of its proper divisors (16510466).

28517974 is a wasteful number, since it uses less digits than its factorization.

28517974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 750494.

The product of its digits is 141120, while the sum is 43.

The square root of 28517974 is about 5340.2222800179. Note that the first 4 decimals coincide. The cubic root of 28517974 is about 305.5199373040.

The spelling of 28517974 in words is "twenty-eight million, five hundred seventeen thousand, nine hundred seventy-four".