72381790 has 32 divisors (see below), whose sum is σ = 142702560. Its totient is φ = 26269824.

The previous prime is 72381787. The next prime is 72381797. The reversal of 72381790 is 9718327.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72381797) 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 15 ways as a sum of consecutive naturals, for example, 2952 + ... + 12388.

It is an arithmetic number, because the mean of its divisors is an integer number (4459455).

Almost surely, 2^72381790 is an apocalyptic number.

72381790 is a deficient number, since it is larger than the sum of its proper divisors (70320770).

72381790 is a wasteful number, since it uses less digits than its factorization.

72381790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9516.

The product of its (nonzero) digits is 21168, while the sum is 37.

The square root of 72381790 is about 8507.7488209279. The cubic root of 72381790 is about 416.7507975894.

The spelling of 72381790 in words is "seventy-two million, three hundred eighty-one thousand, seven hundred ninety".