72204645 has 8 divisors (see below), whose sum is σ = 115527456. Its totient is φ = 38509136.

The previous prime is 72204641. The next prime is 72204647. The reversal of 72204645 is 54640227.

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 72204645 - 2² = 72204641 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72204641) 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, 2406807 + ... + 2406836.

It is an arithmetic number, because the mean of its divisors is an integer number (14440932).

Almost surely, 2^72204645 is an apocalyptic number.

It is an amenable number.

72204645 is a deficient number, since it is larger than the sum of its proper divisors (43322811).

72204645 is a wasteful number, since it uses less digits than its factorization.

72204645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4813651.

The product of its (nonzero) digits is 13440, while the sum is 30.

The square root of 72204645 is about 8497.3316399915. The cubic root of 72204645 is about 416.4105387664.

The spelling of 72204645 in words is "seventy-two million, two hundred four thousand, six hundred forty-five".