72704786 has 48 divisors (see below), whose sum is σ = 138354048. Its totient is φ = 28047360.

The previous prime is 72704783. The next prime is 72704791. The reversal of 72704786 is 68740727.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72704783) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 282770 + ... + 283026.

It is an arithmetic number, because the mean of its divisors is an integer number (2882376).

Almost surely, 2^72704786 is an apocalyptic number.

72704786 is a deficient number, since it is larger than the sum of its proper divisors (65649262).

72704786 is a wasteful number, since it uses less digits than its factorization.

72704786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 455 (or 444 counting only the distinct ones).

The product of its (nonzero) digits is 131712, while the sum is 41.

The square root of 72704786 is about 8526.7101510489. The cubic root of 72704786 is about 417.3697797472.

The spelling of 72704786 in words is "seventy-two million, seven hundred four thousand, seven hundred eighty-six".