28171832 has 64 divisors (see below), whose sum is σ = 61236000. Its totient is φ = 12040704.

The previous prime is 28171823. The next prime is 28171841. The reversal of 28171832 is 23817182.

It is an interprime number because it is at equal distance from previous prime (28171823) and next prime (28171841).

It is a congruent number.

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, 104594 + ... + 104862.

Almost surely, 2^28171832 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28171832, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30618000).

28171832 is an abundant number, since it is smaller than the sum of its proper divisors (33064168).

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

28171832 is a wasteful number, since it uses less digits than its factorization.

28171832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 360 (or 356 counting only the distinct ones).

The product of its digits is 5376, while the sum is 32.

The square root of 28171832 is about 5307.7143856843. The cubic root of 28171832 is about 304.2788012481.

The spelling of 28171832 in words is "twenty-eight million, one hundred seventy-one thousand, eight hundred thirty-two".