72183812 has 24 divisors (see below), whose sum is σ = 133946400. Its totient is φ = 33941376.

The previous prime is 72183809. The next prime is 72183817. The reversal of 72183812 is 21838127.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (72183817) 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, 7148 + ... + 13980.

It is an arithmetic number, because the mean of its divisors is an integer number (5581100).

Almost surely, 2^72183812 is an apocalyptic number.

It is an amenable number.

72183812 is a deficient number, since it is larger than the sum of its proper divisors (61762588).

72183812 is a wasteful number, since it uses less digits than its factorization.

72183812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6995 (or 6993 counting only the distinct ones).

The product of its digits is 5376, while the sum is 32.

The square root of 72183812 is about 8496.1056961410. The cubic root of 72183812 is about 416.3704863330.

The spelling of 72183812 in words is "seventy-two million, one hundred eighty-three thousand, eight hundred twelve".