172270990 has 8 divisors (see below), whose sum is σ = 310087800. Its totient is φ = 68908392.

The previous prime is 172270949. The next prime is 172270997. The reversal of 172270990 is 99072271.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172270997) 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, 8613540 + ... + 8613559.

It is an arithmetic number, because the mean of its divisors is an integer number (38760975).

Almost surely, 2^172270990 is an apocalyptic number.

172270990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

172270990 is a deficient number, since it is larger than the sum of its proper divisors (137816810).

172270990 is a wasteful number, since it uses less digits than its factorization.

172270990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17227106.

The product of its (nonzero) digits is 15876, while the sum is 37.

The square root of 172270990 is about 13125.2043793611. The cubic root of 172270990 is about 556.4216885332.

The spelling of 172270990 in words is "one hundred seventy-two million, two hundred seventy thousand, nine hundred ninety".