72299386 has 4 divisors (see below), whose sum is σ = 108449082. Its totient is φ = 36149692.

The previous prime is 72299377. The next prime is 72299387. The reversal of 72299386 is 68399227.

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., 67322025 + 4977361 = 8205^2 + 2231^2 .

It is not an unprimeable number, because it can be changed into a prime (72299387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18074845 + ... + 18074848.

Almost surely, 2^72299386 is an apocalyptic number.

72299386 is a deficient number, since it is larger than the sum of its proper divisors (36149696).

72299386 is a wasteful number, since it uses less digits than its factorization.

72299386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36149695.

The product of its digits is 326592, while the sum is 46.

The square root of 72299386 is about 8502.9045625598. The cubic root of 72299386 is about 416.5925857274.

The spelling of 72299386 in words is "seventy-two million, two hundred ninety-nine thousand, three hundred eighty-six".