72067738 has 16 divisors (see below), whose sum is σ = 110025216. Its totient is φ = 35397760.

The previous prime is 72067729. The next prime is 72067739. The reversal of 72067738 is 83776027.

It is a self number, because there is not a number n which added to its sum of digits gives 72067738.

It is not an unprimeable number, because it can be changed into a prime (72067739) 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, 30570 + ... + 32842.

It is an arithmetic number, because the mean of its divisors is an integer number (6876576).

Almost surely, 2^72067738 is an apocalyptic number.

72067738 is a deficient number, since it is larger than the sum of its proper divisors (37957478).

72067738 is a wasteful number, since it uses less digits than its factorization.

72067738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2549.

The product of its (nonzero) digits is 98784, while the sum is 40.

The square root of 72067738 is about 8489.2719358023. The cubic root of 72067738 is about 416.1471873459.

The spelling of 72067738 in words is "seventy-two million, sixty-seven thousand, seven hundred thirty-eight".