72264328 has 16 divisors (see below), whose sum is σ = 136186380. Its totient is φ = 35947968.

The previous prime is 72264323. The next prime is 72264371. The reversal of 72264328 is 82346227.

It can be written as a sum of positive squares in 2 ways, for example, as 48469444 + 23794884 = 6962^2 + 4878^2 .

It is a junction number, because it is equal to n+sod(n) for n = 72264293 and 72264302.

It is not an unprimeable number, because it can be changed into a prime (72264323) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 21351 + ... + 24502.

Almost surely, 2^72264328 is an apocalyptic number.

It is an amenable number.

72264328 is a deficient number, since it is larger than the sum of its proper divisors (63922052).

72264328 is a wasteful number, since it uses less digits than its factorization.

72264328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46056 (or 46052 counting only the distinct ones).

The product of its digits is 32256, while the sum is 34.

The square root of 72264328 is about 8500.8427817482. The cubic root of 72264328 is about 416.5252395393.

The spelling of 72264328 in words is "seventy-two million, two hundred sixty-four thousand, three hundred twenty-eight".