72204809 has 8 divisors (see below), whose sum is σ = 74986560. Its totient is φ = 69442576.

The previous prime is 72204793. The next prime is 72204817. The reversal of 72204809 is 90840227.

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

It is a cyclic number.

It is not a de Polignac number, because 72204809 - 2⁴ = 72204793 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (72204829) 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, 2894 + ... + 12360.

It is an arithmetic number, because the mean of its divisors is an integer number (9373320).

Almost surely, 2^72204809 is an apocalyptic number.

It is an amenable number.

72204809 is a deficient number, since it is larger than the sum of its proper divisors (2781751).

72204809 is a wasteful number, since it uses less digits than its factorization.

72204809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9759.

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 72204809 is about 8497.3412900742. The cubic root of 72204809 is about 416.4108540337.

The spelling of 72204809 in words is "seventy-two million, two hundred four thousand, eight hundred nine".