172073540 has 12 divisors (see below), whose sum is σ = 361354476. Its totient is φ = 68829408.

The previous prime is 172073537. The next prime is 172073543. The reversal of 172073540 is 45370271.

It is an interprime number because it is at equal distance from previous prime (172073537) and next prime (172073543).

It can be written as a sum of positive squares in 2 ways, for example, as 66846976 + 105226564 = 8176^2 + 10258^2 .

It is not an unprimeable number, because it can be changed into a prime (172073543) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4301819 + ... + 4301858.

It is an arithmetic number, because the mean of its divisors is an integer number (30112873).

Almost surely, 2^172073540 is an apocalyptic number.

172073540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

172073540 is an abundant number, since it is smaller than the sum of its proper divisors (189280936).

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

172073540 is a wasteful number, since it uses less digits than its factorization.

172073540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8603686 (or 8603684 counting only the distinct ones).

The product of its (nonzero) digits is 5880, while the sum is 29.

The square root of 172073540 is about 13117.6804351989. The cubic root of 172073540 is about 556.2090246297.

The spelling of 172073540 in words is "one hundred seventy-two million, seventy-three thousand, five hundred forty".