72005716 has 12 divisors (see below), whose sum is σ = 126070420. Its totient is φ = 35985600.

The previous prime is 72005701. The next prime is 72005729. The reversal of 72005716 is 61750027.

It can be written as a sum of positive squares in 2 ways, for example, as 1948816 + 70056900 = 1396^2 + 8370^2 .

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

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, 11566 + ... + 16666.

Almost surely, 2^72005716 is an apocalyptic number.

It is an amenable number.

72005716 is a deficient number, since it is larger than the sum of its proper divisors (54064704).

72005716 is a wasteful number, since it uses less digits than its factorization.

72005716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8634 (or 8632 counting only the distinct ones).

The product of its (nonzero) digits is 2940, while the sum is 28.

The square root of 72005716 is about 8485.6181860840. The cubic root of 72005716 is about 416.0277733553.

The spelling of 72005716 in words is "seventy-two million, five thousand, seven hundred sixteen".