172040090 has 16 divisors (see below), whose sum is σ = 309846600. Its totient is φ = 68777280.

The previous prime is 172040083. The next prime is 172040107. The reversal of 172040090 is 90040271.

It can be written as a sum of positive squares in 4 ways, for example, as 158030041 + 14010049 = 12571^2 + 3743^2 .

It is an unprimeable number.

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, 19736 + ... + 27084.

Almost surely, 2^172040090 is an apocalyptic number.

172040090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

172040090 is a deficient number, since it is larger than the sum of its proper divisors (137806510).

172040090 is a wasteful number, since it uses less digits than its factorization.

172040090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9697.

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 172040090 is about 13116.4053764742. The cubic root of 172040090 is about 556.1729811304.

The spelling of 172040090 in words is "one hundred seventy-two million, forty thousand, ninety".