72012786 has 16 divisors (see below), whose sum is σ = 144108768. Its totient is φ = 23990400.

The previous prime is 72012781. The next prime is 72012797. The reversal of 72012786 is 68721027.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (72012781) 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, 18381 + ... + 21951.

It is an arithmetic number, because the mean of its divisors is an integer number (9006798).

Almost surely, 2^72012786 is an apocalyptic number.

72012786 is an abundant number, since it is smaller than the sum of its proper divisors (72095982).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72012786 is a wasteful number, since it uses less digits than its factorization.

72012786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6937.

The product of its (nonzero) digits is 9408, while the sum is 33.

The square root of 72012786 is about 8486.0347630681. The cubic root of 72012786 is about 416.0413890341.

The spelling of 72012786 in words is "seventy-two million, twelve thousand, seven hundred eighty-six".