72309346 has 8 divisors (see below), whose sum is σ = 108697680. Its totient is φ = 36076788.

The previous prime is 72309337. The next prime is 72309379. The reversal of 72309346 is 64390327.

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

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 37776 + ... + 39643.

It is an arithmetic number, because the mean of its divisors is an integer number (13587210).

Almost surely, 2^72309346 is an apocalyptic number.

72309346 is a deficient number, since it is larger than the sum of its proper divisors (36388334).

72309346 is a wasteful number, since it uses less digits than its factorization.

72309346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77888.

The product of its (nonzero) digits is 27216, while the sum is 34.

The square root of 72309346 is about 8503.4902246078. The cubic root of 72309346 is about 416.6117148508.

The spelling of 72309346 in words is "seventy-two million, three hundred nine thousand, three hundred forty-six".