28172494 has 16 divisors (see below), whose sum is σ = 49474656. Its totient is φ = 11779200.

The previous prime is 28172479. The next prime is 28172513. The reversal of 28172494 is 49427182.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23967 + ... + 25114.

It is an arithmetic number, because the mean of its divisors is an integer number (3092166).

Almost surely, 2^28172494 is an apocalyptic number.

28172494 is a deficient number, since it is larger than the sum of its proper divisors (21302162).

28172494 is a wasteful number, since it uses less digits than its factorization.

28172494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49131.

The product of its digits is 32256, while the sum is 37.

The square root of 28172494 is about 5307.7767473774. The cubic root of 28172494 is about 304.2811846098.

The spelling of 28172494 in words is "twenty-eight million, one hundred seventy-two thousand, four hundred ninety-four".