72320394 has 8 divisors (see below), whose sum is σ = 144640800. Its totient is φ = 24106796.

The previous prime is 72320383. The next prime is 72320399. The reversal of 72320394 is 49302327.

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

72320394 is an admirable number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (72320399) 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, 6026694 + ... + 6026705.

It is an arithmetic number, because the mean of its divisors is an integer number (18080100).

Almost surely, 2^72320394 is an apocalyptic number.

72320394 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72320394 is a wasteful number, since it uses less digits than its factorization.

72320394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12053404.

The product of its (nonzero) digits is 9072, while the sum is 30.

The square root of 72320394 is about 8504.1398154076. The cubic root of 72320394 is about 416.6329315265.

The spelling of 72320394 in words is "seventy-two million, three hundred twenty thousand, three hundred ninety-four".