72565790 has 16 divisors (see below), whose sum is σ = 142493040. Its totient is φ = 26387520.

The previous prime is 72565789. The next prime is 72565793. The reversal of 72565790 is 9756527.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72565793) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 329735 + ... + 329954.

It is an arithmetic number, because the mean of its divisors is an integer number (8905815).

Almost surely, 2^72565790 is an apocalyptic number.

72565790 is a deficient number, since it is larger than the sum of its proper divisors (69927250).

72565790 is a wasteful number, since it uses less digits than its factorization.

72565790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 659707.

The product of its (nonzero) digits is 132300, while the sum is 41.

The square root of 72565790 is about 8518.5556287436. Note that the first 3 decimals coincide. The cubic root of 72565790 is about 417.1036361560.

The spelling of 72565790 in words is "seventy-two million, five hundred sixty-five thousand, seven hundred ninety".