172307830 has 16 divisors (see below), whose sum is σ = 317719584. Its totient is φ = 67241920.

The previous prime is 172307819. The next prime is 172307831. The reversal of 172307830 is 38703271.

172307830 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 172307792 and 172307801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172307831) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 209722 + ... + 210541.

It is an arithmetic number, because the mean of its divisors is an integer number (19857474).

Almost surely, 2^172307830 is an apocalyptic number.

172307830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

172307830 is a deficient number, since it is larger than the sum of its proper divisors (145411754).

172307830 is a wasteful number, since it uses less digits than its factorization.

172307830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 420311.

The product of its (nonzero) digits is 7056, while the sum is 31.

The square root of 172307830 is about 13126.6077110577. The cubic root of 172307830 is about 556.4613491361.

The spelling of 172307830 in words is "one hundred seventy-two million, three hundred seven thousand, eight hundred thirty".