172299428 has 24 divisors (see below), whose sum is σ = 346920000. Its totient is φ = 73345248.

The previous prime is 172299419. The next prime is 172299433. The reversal of 172299428 is 824992271.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16478 + ... + 24821.

It is an arithmetic number, because the mean of its divisors is an integer number (14455000).

Almost surely, 2^172299428 is an apocalyptic number.

It is an amenable number.

172299428 is an abundant number, since it is smaller than the sum of its proper divisors (174620572).

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

172299428 is a wasteful number, since it uses less digits than its factorization.

172299428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41459 (or 41457 counting only the distinct ones).

The product of its digits is 145152, while the sum is 44.

The square root of 172299428 is about 13126.2876701678. The cubic root of 172299428 is about 556.4523043464.

The spelling of 172299428 in words is "one hundred seventy-two million, two hundred ninety-nine thousand, four hundred twenty-eight".