72728806 has 8 divisors (see below), whose sum is σ = 113836464. Its totient is φ = 34783320.

The previous prime is 72728801. The next prime is 72728809. The reversal of 72728806 is 60882727.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72728801) 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, 790485 + ... + 790576.

It is an arithmetic number, because the mean of its divisors is an integer number (14229558).

Almost surely, 2^72728806 is an apocalyptic number.

72728806 is a deficient number, since it is larger than the sum of its proper divisors (41107658).

72728806 is a wasteful number, since it uses less digits than its factorization.

72728806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1581086.

The product of its (nonzero) digits is 75264, while the sum is 40.

The square root of 72728806 is about 8528.1185498327. The cubic root of 72728806 is about 417.4157378325.

The spelling of 72728806 in words is "seventy-two million, seven hundred twenty-eight thousand, eight hundred six".