72117302 has 8 divisors (see below), whose sum is σ = 108233112. Its totient is φ = 36039600.

The previous prime is 72117271. The next prime is 72117307. The reversal of 72117302 is 20371127.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72117307) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4199 + ... + 12722.

It is an arithmetic number, because the mean of its divisors is an integer number (13529139).

Almost surely, 2^72117302 is an apocalyptic number.

72117302 is a deficient number, since it is larger than the sum of its proper divisors (36115810).

72117302 is a wasteful number, since it uses less digits than its factorization.

72117302 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19054.

The product of its (nonzero) digits is 588, while the sum is 23.

The square root of 72117302 is about 8492.1906478835. The cubic root of 72117302 is about 416.2425660971.

Adding to 72117302 its reverse (20371127), we get a palindrome (92488429).

The spelling of 72117302 in words is "seventy-two million, one hundred seventeen thousand, three hundred two".