172841940 has 144 divisors (see below), whose sum is σ = 543711168. Its totient is φ = 44416512.

The previous prime is 172841927. The next prime is 172841951. The reversal of 172841940 is 49148271.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 172841895 and 172841904.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1060299 + ... + 1060461.

It is an arithmetic number, because the mean of its divisors is an integer number (3775772).

Almost surely, 2^172841940 is an apocalyptic number.

172841940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 172841940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (271855584).

172841940 is an abundant number, since it is smaller than the sum of its proper divisors (370869228).

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

172841940 is a wasteful number, since it uses less digits than its factorization.

172841940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358 (or 353 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 172841940 is about 13146.9365252898. The cubic root of 172841940 is about 557.0357184800.

The spelling of 172841940 in words is "one hundred seventy-two million, eight hundred forty-one thousand, nine hundred forty".