72225386 has 4 divisors (see below), whose sum is σ = 108338082. Its totient is φ = 36112692.

The previous prime is 72225343. The next prime is 72225407. The reversal of 72225386 is 68352227.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 68352227 = 463 ⋅147629.

It can be written as a sum of positive squares in only one way, i.e., 60357361 + 11868025 = 7769^2 + 3445^2 .

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18056345 + ... + 18056348.

Almost surely, 2^72225386 is an apocalyptic number.

72225386 is a deficient number, since it is larger than the sum of its proper divisors (36112696).

72225386 is a wasteful number, since it uses less digits than its factorization.

72225386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36112695.

The product of its digits is 40320, while the sum is 35.

The square root of 72225386 is about 8498.5519943106. The cubic root of 72225386 is about 416.4504066731.

The spelling of 72225386 in words is "seventy-two million, two hundred twenty-five thousand, three hundred eighty-six".