172630940 has 24 divisors (see below), whose sum is σ = 374220672. Its totient is φ = 66824640.

The previous prime is 172630919. The next prime is 172630943. The reversal of 172630940 is 49036271.

It is a junction number, because it is equal to n+sod(n) for n = 172630897 and 172630906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172630943) 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, 138599 + ... + 139838.

It is an arithmetic number, because the mean of its divisors is an integer number (15592528).

Almost surely, 2^172630940 is an apocalyptic number.

172630940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

172630940 is an abundant number, since it is smaller than the sum of its proper divisors (201589732).

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

172630940 is a wasteful number, since it uses less digits than its factorization.

172630940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278477 (or 278475 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 172630940 is about 13138.9093915743. The cubic root of 172630940 is about 556.8089556226.

The spelling of 172630940 in words is "one hundred seventy-two million, six hundred thirty thousand, nine hundred forty".