72236786 has 4 divisors (see below), whose sum is σ = 108355182. Its totient is φ = 36118392.

The previous prime is 72236783. The next prime is 72236821. The reversal of 72236786 is 68763227.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 70879561 + 1357225 = 8419^2 + 1165^2 .

It is not an unprimeable number, because it can be changed into a prime (72236783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18059195 + ... + 18059198.

Almost surely, 2^72236786 is an apocalyptic number.

72236786 is a deficient number, since it is larger than the sum of its proper divisors (36118396).

72236786 is a wasteful number, since it uses less digits than its factorization.

72236786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36118395.

The product of its digits is 169344, while the sum is 41.

The square root of 72236786 is about 8499.2226703387. Note that the first 3 decimals coincide. The cubic root of 72236786 is about 416.4723162589.

The spelling of 72236786 in words is "seventy-two million, two hundred thirty-six thousand, seven hundred eighty-six".