8172730 has 8 divisors (see below), whose sum is σ = 14710932. Its totient is φ = 3269088.

The previous prime is 8172713. The next prime is 8172821. The reversal of 8172730 is 372718.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 7969329 + 203401 = 2823^2 + 451^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 408627 + ... + 408646.

Almost surely, 2^8172730 is an apocalyptic number.

8172730 is a deficient number, since it is larger than the sum of its proper divisors (6538202).

8172730 is a wasteful number, since it uses less digits than its factorization.

8172730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 817280.

The product of its (nonzero) digits is 2352, while the sum is 28.

The square root of 8172730 is about 2858.7986987544. The cubic root of 8172730 is about 201.4291795690.

The spelling of 8172730 in words is "eight million, one hundred seventy-two thousand, seven hundred thirty".