172274868 has 36 divisors (see below), whose sum is σ = 437395140. Its totient is φ = 57171456.

The previous prime is 172274831. The next prime is 172274891. The reversal of 172274868 is 868472271.

It can be written as a sum of positive squares in 2 ways, for example, as 135769104 + 36505764 = 11652^2 + 6042^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2205 + ... + 18692.

It is an arithmetic number, because the mean of its divisors is an integer number (12149865).

Almost surely, 2^172274868 is an apocalyptic number.

172274868 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

172274868 is an abundant number, since it is smaller than the sum of its proper divisors (265120272).

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

172274868 is a wasteful number, since it uses less digits than its factorization.

172274868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21136 (or 21131 counting only the distinct ones).

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

The square root of 172274868 is about 13125.3521095626. The cubic root of 172274868 is about 556.4258637131.

The spelling of 172274868 in words is "one hundred seventy-two million, two hundred seventy-four thousand, eight hundred sixty-eight".