72816478 has 16 divisors (see below), whose sum is σ = 126540000. Its totient is φ = 30779136.

The previous prime is 72816467. The next prime is 72816479. The reversal of 72816478 is 87461827.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72816479) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34603 + ... + 36646.

It is an arithmetic number, because the mean of its divisors is an integer number (7908750).

Almost surely, 2^72816478 is an apocalyptic number.

72816478 is a deficient number, since it is larger than the sum of its proper divisors (53723522).

72816478 is a wasteful number, since it uses less digits than its factorization.

72816478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71331.

The product of its digits is 150528, while the sum is 43.

The square root of 72816478 is about 8533.2571741393. The cubic root of 72816478 is about 417.5833971113.

The spelling of 72816478 in words is "seventy-two million, eight hundred sixteen thousand, four hundred seventy-eight".