172228626 has 16 divisors (see below), whose sum is σ = 382730400. Its totient is φ = 57409524.

The previous prime is 172228621. The next prime is 172228627. The reversal of 172228626 is 626822271.

172228626 is a `hidden beast` number, since 1 + 7 + 2 + 2 + 28 + 626 = 666.

It is a super-2 number, since 2×172228626² = 59325399227695752, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (172228621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1594656 + ... + 1594763.

It is an arithmetic number, because the mean of its divisors is an integer number (23920650).

Almost surely, 2^172228626 is an apocalyptic number.

172228626 is an abundant number, since it is smaller than the sum of its proper divisors (210501774).

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

172228626 is a wasteful number, since it uses less digits than its factorization.

172228626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3189430 (or 3189424 counting only the distinct ones).

The product of its digits is 32256, while the sum is 36.

The square root of 172228626 is about 13123.5904385957. The cubic root of 172228626 is about 556.3760740028.

The spelling of 172228626 in words is "one hundred seventy-two million, two hundred twenty-eight thousand, six hundred twenty-six".