172868472 has 96 divisors (see below), whose sum is σ = 558622800. Its totient is φ = 49387968.

The previous prime is 172868467. The next prime is 172868513. The reversal of 172868472 is 274868271.

172868472 is a `hidden beast` number, since 172 + 8 + 6 + 8 + 472 = 666.

172868472 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×172868472² = 59767017223229568, which contains 22 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its 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 23 ways as a sum of consecutive naturals, for example, 2418 + ... + 18750.

Almost surely, 2^172868472 is an apocalyptic number.

172868472 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 172868472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (279311400).

172868472 is an abundant number, since it is smaller than the sum of its proper divisors (385754328).

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

172868472 is a wasteful number, since it uses less digits than its factorization.

172868472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16362 (or 16345 counting only the distinct ones).

The product of its digits is 301056, while the sum is 45.

The square root of 172868472 is about 13147.9455429356. The cubic root of 172868472 is about 557.0642195014.

The spelling of 172868472 in words is "one hundred seventy-two million, eight hundred sixty-eight thousand, four hundred seventy-two".