172929730 has 32 divisors (see below), whose sum is σ = 317945088. Its totient is φ = 67704000.

The previous prime is 172929721. The next prime is 172929733. The reversal of 172929730 is 37929271.

It is not an unprimeable number, because it can be changed into a prime (172929733) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 106404 + ... + 108016.

It is an arithmetic number, because the mean of its divisors is an integer number (9935784).

Almost surely, 2^172929730 is an apocalyptic number.

172929730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

172929730 is a deficient number, since it is larger than the sum of its proper divisors (145015358).

172929730 is a wasteful number, since it uses less digits than its factorization.

172929730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1842.

The product of its (nonzero) digits is 47628, while the sum is 40.

The square root of 172929730 is about 13150.2749020695. The cubic root of 172929730 is about 557.1300125087.

The spelling of 172929730 in words is "one hundred seventy-two million, nine hundred twenty-nine thousand, seven hundred thirty".