72011812 has 12 divisors (see below), whose sum is σ = 126331660. Its totient is φ = 35917056.

The previous prime is 72011809. The next prime is 72011833. The reversal of 72011812 is 21811027.

It can be written as a sum of positive squares in 2 ways, for example, as 61873956 + 10137856 = 7866^2 + 3184^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20373 + ... + 23644.

Almost surely, 2^72011812 is an apocalyptic number.

It is an amenable number.

72011812 is a deficient number, since it is larger than the sum of its proper divisors (54319848).

72011812 is a wasteful number, since it uses less digits than its factorization.

72011812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44430 (or 44428 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 22.

The square root of 72011812 is about 8485.9773744690. The cubic root of 72011812 is about 416.0395133202.

Adding to 72011812 its reverse (21811027), we get a palindrome (93822839).

The spelling of 72011812 in words is "seventy-two million, eleven thousand, eight hundred twelve".