72684646 has 16 divisors (see below), whose sum is σ = 117439488. Its totient is φ = 33640200.

The previous prime is 72684641. The next prime is 72684649. The reversal of 72684646 is 64648627.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72684641) 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 7 ways as a sum of consecutive naturals, for example, 24060 + ... + 26911.

It is an arithmetic number, because the mean of its divisors is an integer number (7339968).

Almost surely, 2^72684646 is an apocalyptic number.

72684646 is a deficient number, since it is larger than the sum of its proper divisors (44754842).

72684646 is a wasteful number, since it uses less digits than its factorization.

72684646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51027.

The product of its digits is 387072, while the sum is 43.

The square root of 72684646 is about 8525.5290744915. The cubic root of 72684646 is about 417.3312375635.

The spelling of 72684646 in words is "seventy-two million, six hundred eighty-four thousand, six hundred forty-six".