72815290 has 16 divisors (see below), whose sum is σ = 131220000. Its totient is φ = 29092240.

The previous prime is 72815251. The next prime is 72815291. The reversal of 72815290 is 9251827.

It is not an unprimeable number, because it can be changed into a prime (72815291) 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 7 ways as a sum of consecutive naturals, for example, 5961 + ... + 13459.

It is an arithmetic number, because the mean of its divisors is an integer number (8201250).

Almost surely, 2^72815290 is an apocalyptic number.

72815290 is a deficient number, since it is larger than the sum of its proper divisors (58404710).

72815290 is a wasteful number, since it uses less digits than its factorization.

72815290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8477.

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 72815290 is about 8533.1875638591. The cubic root of 72815290 is about 417.5811261428.

The spelling of 72815290 in words is "seventy-two million, eight hundred fifteen thousand, two hundred ninety".