72394809 has 8 divisors (see below), whose sum is σ = 97428960. Its totient is φ = 47811936.

The previous prime is 72394801. The next prime is 72394813. The reversal of 72394809 is 90849327.

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

It is not a de Polignac number, because 72394809 - 2³ = 72394801 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72394801) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 112444 + ... + 113085.

It is an arithmetic number, because the mean of its divisors is an integer number (12178620).

Almost surely, 2^72394809 is an apocalyptic number.

It is an amenable number.

72394809 is a deficient number, since it is larger than the sum of its proper divisors (25034151).

72394809 is a wasteful number, since it uses less digits than its factorization.

72394809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225639.

The product of its (nonzero) digits is 108864, while the sum is 42.

The square root of 72394809 is about 8508.5139125467. The cubic root of 72394809 is about 416.7757824803.

The spelling of 72394809 in words is "seventy-two million, three hundred ninety-four thousand, eight hundred nine".