172347426 has 20 divisors (see below), whose sum is σ = 386186262. Its totient is φ = 57449088.

The previous prime is 172347401. The next prime is 172347431. The reversal of 172347426 is 624743271.

It can be written as a sum of positive squares in only one way, i.e., 114511401 + 57836025 = 10701^2 + 7605^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 531775 + ... + 532098.

Almost surely, 2^172347426 is an apocalyptic number.

172347426 is an abundant number, since it is smaller than the sum of its proper divisors (213838836).

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

172347426 is a wasteful number, since it uses less digits than its factorization.

172347426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1063887 (or 1063878 counting only the distinct ones).

The product of its digits is 56448, while the sum is 36.

The square root of 172347426 is about 13128.1158587209. The cubic root of 172347426 is about 556.5039704456.

The spelling of 172347426 in words is "one hundred seventy-two million, three hundred forty-seven thousand, four hundred twenty-six".