172005830 has 16 divisors (see below), whose sum is σ = 327823200. Its totient is φ = 64755072.

The previous prime is 172005781. The next prime is 172005851. The reversal of 172005830 is 38500271.

It is a self number, because there is not a number n which added to its sum of digits gives 172005830.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 505730 + ... + 506069.

It is an arithmetic number, because the mean of its divisors is an integer number (20488950).

Almost surely, 2^172005830 is an apocalyptic number.

172005830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

172005830 is a deficient number, since it is larger than the sum of its proper divisors (155817370).

172005830 is a wasteful number, since it uses less digits than its factorization.

172005830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1011823.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 172005830 is about 13115.0993133868. The cubic root of 172005830 is about 556.1360599854.

The spelling of 172005830 in words is "one hundred seventy-two million, five thousand, eight hundred thirty".