72631606 has 8 divisors (see below), whose sum is σ = 109137960. Its totient is φ = 36252288.

The previous prime is 72631589. The next prime is 72631609. The reversal of 72631606 is 60613627.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72631609) 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 3 ways as a sum of consecutive naturals, for example, 30316 + ... + 32623.

It is an arithmetic number, because the mean of its divisors is an integer number (13642245).

Almost surely, 2^72631606 is an apocalyptic number.

72631606 is a deficient number, since it is larger than the sum of its proper divisors (36506354).

72631606 is a wasteful number, since it uses less digits than its factorization.

72631606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63518.

The product of its (nonzero) digits is 9072, while the sum is 31.

The square root of 72631606 is about 8522.4178494134. The cubic root of 72631606 is about 417.2297001390.

It can be divided in two parts, 72631 and 606, that added together give a palindrome (73237).

The spelling of 72631606 in words is "seventy-two million, six hundred thirty-one thousand, six hundred six".