172109340 has 96 divisors (see below), whose sum is σ = 576663360. Its totient is φ = 42363648.

The previous prime is 172109323. The next prime is 172109341. The reversal of 172109340 is 43901271.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172109341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5239 + ... + 19278.

It is an arithmetic number, because the mean of its divisors is an integer number (6006910).

Almost surely, 2^172109340 is an apocalyptic number.

172109340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

172109340 is an abundant number, since it is smaller than the sum of its proper divisors (404554020).

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

172109340 is a wasteful number, since it uses less digits than its factorization.

172109340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24548 (or 24540 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 172109340 is about 13119.0449347504. The cubic root of 172109340 is about 556.2475951586.

The spelling of 172109340 in words is "one hundred seventy-two million, one hundred nine thousand, three hundred forty".