72005236 has 12 divisors (see below), whose sum is σ = 126167328. Its totient is φ = 35957432.

The previous prime is 72005233. The next prime is 72005237. The reversal of 72005236 is 63250027.

It is a super-2 number, since 2×72005236² = 10369508022831392, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 72005236.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72005233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7576 + ... + 14191.

It is an arithmetic number, because the mean of its divisors is an integer number (10513944).

Almost surely, 2^72005236 is an apocalyptic number.

It is an amenable number.

72005236 is a deficient number, since it is larger than the sum of its proper divisors (54162092).

72005236 is a wasteful number, since it uses less digits than its factorization.

72005236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22598 (or 22596 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 25.

The square root of 72005236 is about 8485.5899028883. The cubic root of 72005236 is about 416.0268489205.

The spelling of 72005236 in words is "seventy-two million, five thousand, two hundred thirty-six".