72785138 has 8 divisors (see below), whose sum is σ = 109398000. Its totient is φ = 36319140.

The previous prime is 72785101. The next prime is 72785191. The reversal of 72785138 is 83158727.

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 = 72785095 and 72785104.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35468 + ... + 37463.

It is an arithmetic number, because the mean of its divisors is an integer number (13674750).

Almost surely, 2^72785138 is an apocalyptic number.

72785138 is a deficient number, since it is larger than the sum of its proper divisors (36612862).

72785138 is a wasteful number, since it uses less digits than its factorization.

72785138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73432.

The product of its digits is 94080, while the sum is 41.

The square root of 72785138 is about 8531.4206319932. The cubic root of 72785138 is about 417.5234796218.

The spelling of 72785138 in words is "seventy-two million, seven hundred eighty-five thousand, one hundred thirty-eight".