28792171 has 4 divisors (see below), whose sum is σ = 29077344. Its totient is φ = 28507000.

The previous prime is 28792139. The next prime is 28792187. The reversal of 28792171 is 17129782.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17129782 = 2 ⋅8564891.

It is a cyclic number.

It is not a de Polignac number, because 28792171 - 2⁵ = 28792139 is a prime.

It is a super-2 number, since 2×28792171² = 1657978221786482, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28792171.

It is not an unprimeable number, because it can be changed into a prime (28795171) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 142435 + ... + 142636.

It is an arithmetic number, because the mean of its divisors is an integer number (7269336).

Almost surely, 2^28792171 is an apocalyptic number.

28792171 is a deficient number, since it is larger than the sum of its proper divisors (285173).

28792171 is a wasteful number, since it uses less digits than its factorization.

28792171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285172.

The product of its digits is 14112, while the sum is 37.

The square root of 28792171 is about 5365.8336724129. The cubic root of 28792171 is about 306.4959952710.

It can be divided in two parts, 2879 and 2171, that added together give a triangular number (5050 = T₁₀₀).

The spelling of 28792171 in words is "twenty-eight million, seven hundred ninety-two thousand, one hundred seventy-one".