172930238 has 16 divisors (see below), whose sum is σ = 291495456. Its totient is φ = 76343520.

The previous prime is 172930237. The next prime is 172930271. The reversal of 172930238 is 832039271.

It is a junction number, because it is equal to n+sod(n) for n = 172930198 and 172930207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172930231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 143993 + ... + 145188.

It is an arithmetic number, because the mean of its divisors is an integer number (18218466).

Almost surely, 2^172930238 is an apocalyptic number.

172930238 is a deficient number, since it is larger than the sum of its proper divisors (118565218).

172930238 is a wasteful number, since it uses less digits than its factorization.

172930238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289219.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 172930238 is about 13150.2942172409. The cubic root of 172930238 is about 557.1305580517.

The spelling of 172930238 in words is "one hundred seventy-two million, nine hundred thirty thousand, two hundred thirty-eight".