72365445 has 24 divisors (see below), whose sum is σ = 125638656. Its totient is φ = 38531808.

The previous prime is 72365443. The next prime is 72365453. The reversal of 72365445 is 54456327.

It is not a de Polignac number, because 72365445 - 2¹ = 72365443 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72365441) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 42684 + ... + 44346.

It is an arithmetic number, because the mean of its divisors is an integer number (5234944).

Almost surely, 2^72365445 is an apocalyptic number.

It is an amenable number.

72365445 is a deficient number, since it is larger than the sum of its proper divisors (53273211).

72365445 is a wasteful number, since it uses less digits than its factorization.

72365445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2641 (or 2638 counting only the distinct ones).

The product of its digits is 100800, while the sum is 36.

The square root of 72365445 is about 8506.7881718073. The cubic root of 72365445 is about 416.7194254971.

The spelling of 72365445 in words is "seventy-two million, three hundred sixty-five thousand, four hundred forty-five".