172238870 has 16 divisors (see below), whose sum is σ = 315880560. Its totient is φ = 67595424.

The previous prime is 172238867. The next prime is 172238887. The reversal of 172238870 is 78832271.

It is a congruent number.

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, 161960 + ... + 163019.

It is an arithmetic number, because the mean of its divisors is an integer number (19742535).

Almost surely, 2^172238870 is an apocalyptic number.

172238870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

172238870 is a deficient number, since it is larger than the sum of its proper divisors (143641690).

172238870 is a wasteful number, since it uses less digits than its factorization.

172238870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325039.

The product of its (nonzero) digits is 37632, while the sum is 38.

The square root of 172238870 is about 13123.9807223266. The cubic root of 172238870 is about 556.3871046962.

The spelling of 172238870 in words is "one hundred seventy-two million, two hundred thirty-eight thousand, eight hundred seventy".