28173234 has 32 divisors (see below), whose sum is σ = 58576896. Its totient is φ = 9023760.

The previous prime is 28173227. The next prime is 28173241. The reversal of 28173234 is 43237182.

It is an interprime number because it is at equal distance from previous prime (28173227) and next prime (28173241).

It is a super-2 number, since 2×28173234² = 1587462228037512, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30609 + ... + 31515.

It is an arithmetic number, because the mean of its divisors is an integer number (1830528).

Almost surely, 2^28173234 is an apocalyptic number.

28173234 is an abundant number, since it is smaller than the sum of its proper divisors (30403662).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28173234 is a wasteful number, since it uses less digits than its factorization.

28173234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1110.

The product of its digits is 8064, while the sum is 30.

The square root of 28173234 is about 5307.8464559556. The cubic root of 28173234 is about 304.2838487462.

The spelling of 28173234 in words is "twenty-eight million, one hundred seventy-three thousand, two hundred thirty-four".