72210256 has 20 divisors (see below), whose sum is σ = 140414004. Its totient is φ = 35974400.

The previous prime is 72210251. The next prime is 72210263. The reversal of 72210256 is 65201227.

It can be written as a sum of positive squares in 2 ways, for example, as 18627856 + 53582400 = 4316^2 + 7320^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 72210256.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72210251) 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, 3535 + ... + 12526.

Almost surely, 2^72210256 is an apocalyptic number.

It is an amenable number.

72210256 is a deficient number, since it is larger than the sum of its proper divisors (68203748).

72210256 is a wasteful number, since it uses less digits than its factorization.

72210256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16350 (or 16344 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 72210256 is about 8497.6617960472. The cubic root of 72210256 is about 416.4213248639.

The spelling of 72210256 in words is "seventy-two million, two hundred ten thousand, two hundred fifty-six".