172740390 has 32 divisors (see below), whose sum is σ = 415017216. Its totient is φ = 46015200.

The previous prime is 172740371. The next prime is 172740397. The reversal of 172740390 is 93047271.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172740397) 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, 32415 + ... + 37365.

It is an arithmetic number, because the mean of its divisors is an integer number (12969288).

Almost surely, 2^172740390 is an apocalyptic number.

172740390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

172740390 is an abundant number, since it is smaller than the sum of its proper divisors (242276826).

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

172740390 is a wasteful number, since it uses less digits than its factorization.

172740390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6124.

The product of its (nonzero) digits is 10584, while the sum is 33.

The square root of 172740390 is about 13143.0738413812. The cubic root of 172740390 is about 556.9266051882.

The spelling of 172740390 in words is "one hundred seventy-two million, seven hundred forty thousand, three hundred ninety".