72239685 has 32 divisors (see below), whose sum is σ = 132537600. Its totient is φ = 32913408.

The previous prime is 72239669. The next prime is 72239701. The reversal of 72239685 is 58693227.

It is an interprime number because it is at equal distance from previous prime (72239669) and next prime (72239701).

It is not a de Polignac number, because 72239685 - 2⁴ = 72239669 is a prime.

It is a congruent 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 in 31 ways as a sum of consecutive naturals, for example, 36091 + ... + 38039.

It is an arithmetic number, because the mean of its divisors is an integer number (4141800).

Almost surely, 2^72239685 is an apocalyptic number.

It is an amenable number.

72239685 is a deficient number, since it is larger than the sum of its proper divisors (60297915).

72239685 is a wasteful number, since it uses less digits than its factorization.

72239685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2317.

The product of its digits is 181440, while the sum is 42.

The square root of 72239685 is about 8499.3932136359. The cubic root of 72239685 is about 416.4778874605.

The spelling of 72239685 in words is "seventy-two million, two hundred thirty-nine thousand, six hundred eighty-five".