72716090 has 8 divisors (see below), whose sum is σ = 130888980. Its totient is φ = 29086432.

The previous prime is 72716071. The next prime is 72716099. The reversal of 72716090 is 9061727.

It can be written as a sum of positive squares in 2 ways, for example, as 71893441 + 822649 = 8479^2 + 907^2 .

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (72716099) 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, 3635795 + ... + 3635814.

Almost surely, 2^72716090 is an apocalyptic number.

72716090 is a deficient number, since it is larger than the sum of its proper divisors (58172890).

72716090 is a wasteful number, since it uses less digits than its factorization.

72716090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7271616.

The product of its (nonzero) digits is 5292, while the sum is 32.

The square root of 72716090 is about 8527.3729835161. The cubic root of 72716090 is about 417.3914092426.

The spelling of 72716090 in words is "seventy-two million, seven hundred sixteen thousand, ninety".