28171472 has 30 divisors (see below), whose sum is σ = 63495378. Its totient is φ = 12073152.

The previous prime is 28171463. The next prime is 28171483. The reversal of 28171472 is 27417182.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 25969216 + 2202256 = 5096^2 + 1484^2 .

It is a super-3 number, since 3×28171472³ (a number of 23 digits) contains 333 as substring.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17183 + ... + 18750.

Almost surely, 2^28171472 is an apocalyptic number.

It is an amenable number.

28171472 is an abundant number, since it is smaller than the sum of its proper divisors (35323906).

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

28171472 is a wasteful number, since it uses less digits than its factorization.

28171472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35955 (or 35942 counting only the distinct ones).

The product of its digits is 6272, while the sum is 32.

The square root of 28171472 is about 5307.6804726735. The cubic root of 28171472 is about 304.2775051446.

The spelling of 28171472 in words is "twenty-eight million, one hundred seventy-one thousand, four hundred seventy-two".