172249628 has 12 divisors (see below), whose sum is σ = 302511552. Its totient is φ = 85817760.

The previous prime is 172249613. The next prime is 172249631. The reversal of 172249628 is 826942271.

It is a super-2 number, since 2×172249628² = 59339868692276768, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75500 + ... + 77747.

It is an arithmetic number, because the mean of its divisors is an integer number (25209296).

Almost surely, 2^172249628 is an apocalyptic number.

It is an amenable number.

172249628 is a deficient number, since it is larger than the sum of its proper divisors (130261924).

172249628 is a wasteful number, since it uses less digits than its factorization.

172249628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153532 (or 153530 counting only the distinct ones).

The product of its digits is 96768, while the sum is 41.

The square root of 172249628 is about 13124.3905763277. The cubic root of 172249628 is about 556.3986883917.

The spelling of 172249628 in words is "one hundred seventy-two million, two hundred forty-nine thousand, six hundred twenty-eight".