172289466 has 12 divisors (see below), whose sum is σ = 373293882. Its totient is φ = 57429816.

The previous prime is 172289461. The next prime is 172289471. The reversal of 172289466 is 664982271.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (172289461) and next prime (172289471).

It can be written as a sum of positive squares in only one way, i.e., 149450625 + 22838841 = 12225^2 + 4779^2 .

It is not an unprimeable number, because it can be changed into a prime (172289461) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4785801 + ... + 4785836.

Almost surely, 2^172289466 is an apocalyptic number.

172289466 is an abundant number, since it is smaller than the sum of its proper divisors (201004416).

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

172289466 is a wasteful number, since it uses less digits than its factorization.

172289466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9571645 (or 9571642 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The square root of 172289466 is about 13125.9081971496. The cubic root of 172289466 is about 556.4415798289.

The spelling of 172289466 in words is "one hundred seventy-two million, two hundred eighty-nine thousand, four hundred sixty-six".