28171452 has 48 divisors (see below), whose sum is σ = 69722240. Its totient is φ = 8828352.

The previous prime is 28171421. The next prime is 28171463. The reversal of 28171452 is 25417182.

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, 35403 + ... + 36189.

Almost surely, 2^28171452 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 28171452, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34861120).

28171452 is an abundant number, since it is smaller than the sum of its proper divisors (41550788).

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

28171452 is a wasteful number, since it uses less digits than its factorization.

28171452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 970 (or 968 counting only the distinct ones).

The product of its digits is 4480, while the sum is 30.

The square root of 28171452 is about 5307.6785886110. The cubic root of 28171452 is about 304.2774331385.

The spelling of 28171452 in words is "twenty-eight million, one hundred seventy-one thousand, four hundred fifty-two".