72007156 has 24 divisors (see below), whose sum is σ = 135936584. Its totient is φ = 33177600.

The previous prime is 72007153. The next prime is 72007213. The reversal of 72007156 is 65170027.

It can be written as a sum of positive squares in 4 ways, for example, as 28900 + 71978256 = 170^2 + 8484^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72007151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59356 + ... + 60556.

Almost surely, 2^72007156 is an apocalyptic number.

It is an amenable number.

72007156 is a deficient number, since it is larger than the sum of its proper divisors (63929428).

72007156 is a wasteful number, since it uses less digits than its factorization.

72007156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2371 (or 2369 counting only the distinct ones).

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

The square root of 72007156 is about 8485.7030351056. The cubic root of 72007156 is about 416.0305466351.

The spelling of 72007156 in words is "seventy-two million, seven thousand, one hundred fifty-six".