172831940 has 48 divisors (see below), whose sum is σ = 373621248. Its totient is φ = 67127424.

The previous prime is 172831903. The next prime is 172831943. The reversal of 172831940 is 49138271.

It is a self number, because there is not a number n which added to its sum of digits gives 172831940.

It is not an unprimeable number, because it can be changed into a prime (172831943) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 108389 + ... + 109971.

It is an arithmetic number, because the mean of its divisors is an integer number (7783776).

Almost surely, 2^172831940 is an apocalyptic number.

172831940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

172831940 is an abundant number, since it is smaller than the sum of its proper divisors (200789308).

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

172831940 is a wasteful number, since it uses less digits than its factorization.

172831940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1748 (or 1746 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 172831940 is about 13146.5562030518. The cubic root of 172831940 is about 557.0249755923.

The spelling of 172831940 in words is "one hundred seventy-two million, eight hundred thirty-one thousand, nine hundred forty".