172371380 has 24 divisors (see below), whose sum is σ = 370810440. Its totient is φ = 67266560.

The previous prime is 172371379. The next prime is 172371383. The reversal of 172371380 is 83173271.

It can be written as a sum of positive squares in 4 ways, for example, as 394384 + 171976996 = 628^2 + 13114^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172371383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 104285 + ... + 105924.

It is an arithmetic number, because the mean of its divisors is an integer number (15450435).

Almost surely, 2^172371380 is an apocalyptic number.

172371380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

172371380 is an abundant number, since it is smaller than the sum of its proper divisors (198439060).

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

172371380 is a wasteful number, since it uses less digits than its factorization.

172371380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210259 (or 210257 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 32.

The square root of 172371380 is about 13129.0281437736. The cubic root of 172371380 is about 556.5297514680.

The spelling of 172371380 in words is "one hundred seventy-two million, three hundred seventy-one thousand, three hundred eighty".