172626380 has 12 divisors (see below), whose sum is σ = 362515440. Its totient is φ = 69050544.

The previous prime is 172626379. The next prime is 172626481. The reversal of 172626380 is 83626271.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 172626380.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4315640 + ... + 4315679.

It is an arithmetic number, because the mean of its divisors is an integer number (30209620).

Almost surely, 2^172626380 is an apocalyptic number.

172626380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

172626380 is an abundant number, since it is smaller than the sum of its proper divisors (189889060).

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

172626380 is a wasteful number, since it uses less digits than its factorization.

172626380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8631328 (or 8631326 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 172626380 is about 13138.7358600438. The cubic root of 172626380 is about 556.8040529264.

The spelling of 172626380 in words is "one hundred seventy-two million, six hundred twenty-six thousand, three hundred eighty".