172266730 has 32 divisors (see below), whose sum is σ = 328023360. Its totient is φ = 64955520.

The previous prime is 172266631. The next prime is 172266733. The reversal of 172266730 is 37662271.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (172266733) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37942 + ... + 42238.

It is an arithmetic number, because the mean of its divisors is an integer number (10250730).

Almost surely, 2^172266730 is an apocalyptic number.

172266730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

172266730 is a deficient number, since it is larger than the sum of its proper divisors (155756630).

172266730 is a wasteful number, since it uses less digits than its factorization.

172266730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4534.

The product of its (nonzero) digits is 21168, while the sum is 34.

The square root of 172266730 is about 13125.0420951706. The cubic root of 172266730 is about 556.4171020076.

The spelling of 172266730 in words is "one hundred seventy-two million, two hundred sixty-six thousand, seven hundred thirty".