172696290 has 64 divisors (see below), whose sum is σ = 448350336. Its totient is φ = 42319872.

The previous prime is 172696261. The next prime is 172696331. The reversal of 172696290 is 92696271.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 99369 + ... + 101091.

It is an arithmetic number, because the mean of its divisors is an integer number (7005474).

Almost surely, 2^172696290 is an apocalyptic number.

172696290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 172696290, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (224175168).

172696290 is an abundant number, since it is smaller than the sum of its proper divisors (275654046).

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

172696290 is a wasteful number, since it uses less digits than its factorization.

172696290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2003.

The product of its (nonzero) digits is 81648, while the sum is 42.

The square root of 172696290 is about 13141.3960445609. The cubic root of 172696290 is about 556.8792073683.

The spelling of 172696290 in words is "one hundred seventy-two million, six hundred ninety-six thousand, two hundred ninety".