72685838 has 8 divisors (see below), whose sum is σ = 109076760. Its totient is φ = 36326920.

The previous prime is 72685801. The next prime is 72685853. The reversal of 72685838 is 83858627.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 72685792 and 72685801.

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 3 ways as a sum of consecutive naturals, for example, 1148 + ... + 12111.

It is an arithmetic number, because the mean of its divisors is an integer number (13634595).

Almost surely, 2^72685838 is an apocalyptic number.

72685838 is a deficient number, since it is larger than the sum of its proper divisors (36390922).

72685838 is a wasteful number, since it uses less digits than its factorization.

72685838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16002.

The product of its digits is 645120, while the sum is 47.

The square root of 72685838 is about 8525.5989818898. The cubic root of 72685838 is about 417.3335189078. Note that the first 3 decimals are identical.

The spelling of 72685838 in words is "seventy-two million, six hundred eighty-five thousand, eight hundred thirty-eight".