72284445 has 12 divisors (see below), whose sum is σ = 125293116. Its totient is φ = 38551680.

The previous prime is 72284431. The next prime is 72284479. The reversal of 72284445 is 54448227.

It can be written as a sum of positive squares in 2 ways, for example, as 26193924 + 46090521 = 5118^2 + 6789^2 .

It is not a de Polignac number, because 72284445 - 2⁹ = 72283933 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 803116 + ... + 803205.

It is an arithmetic number, because the mean of its divisors is an integer number (10441093).

Almost surely, 2^72284445 is an apocalyptic number.

It is an amenable number.

72284445 is a deficient number, since it is larger than the sum of its proper divisors (53008671).

72284445 is a wasteful number, since it uses less digits than its factorization.

72284445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1606332 (or 1606329 counting only the distinct ones).

The product of its digits is 71680, while the sum is 36.

The square root of 72284445 is about 8502.0259350345. The cubic root of 72284445 is about 416.5638868270.

The spelling of 72284445 in words is "seventy-two million, two hundred eighty-four thousand, four hundred forty-five".