72365839 has 16 divisors (see below), whose sum is σ = 89474112. Its totient is φ = 56994048.

The previous prime is 72365837. The next prime is 72365857. The reversal of 72365839 is 93856327.

It is a cyclic number.

It is not a de Polignac number, because 72365839 - 2¹ = 72365837 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 72365795 and 72365804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72365831) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19497 + ... + 22909.

It is an arithmetic number, because the mean of its divisors is an integer number (5592132).

Almost surely, 2^72365839 is an apocalyptic number.

72365839 is a deficient number, since it is larger than the sum of its proper divisors (17108273).

72365839 is a wasteful number, since it uses less digits than its factorization.

72365839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3666.

The product of its digits is 272160, while the sum is 43.

The square root of 72365839 is about 8506.8113297522. The cubic root of 72365839 is about 416.7201817842.

The spelling of 72365839 in words is "seventy-two million, three hundred sixty-five thousand, eight hundred thirty-nine".