72765438 has 16 divisors (see below), whose sum is σ = 146100240. Its totient is φ = 24160256.

The previous prime is 72765431. The next prime is 72765443. The reversal of 72765438 is 83456727.

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 72765438.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72765431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22053 + ... + 25136.

It is an arithmetic number, because the mean of its divisors is an integer number (9131265).

Almost surely, 2^72765438 is an apocalyptic number.

72765438 is an abundant number, since it is smaller than the sum of its proper divisors (73334802).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72765438 is a wasteful number, since it uses less digits than its factorization.

72765438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47451.

The product of its digits is 282240, while the sum is 42.

The square root of 72765438 is about 8530.2659981972. The cubic root of 72765438 is about 417.4858073032.

The spelling of 72765438 in words is "seventy-two million, seven hundred sixty-five thousand, four hundred thirty-eight".