72439219828 has 12 divisors (see below), whose sum is σ = 131139967140. Its totient is φ = 34970657792.

The previous prime is 72439219819. The next prime is 72439219829. The reversal of 72439219828 is 82891293427.

It can be written as a sum of positive squares in 2 ways, for example, as 48166203024 + 24273016804 = 219468^2 + 155798^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72439219829) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 312237901 + ... + 312238132.

It is an arithmetic number, because the mean of its divisors is an integer number (10928330595).

Almost surely, 2^72439219828 is an apocalyptic number.

It is an amenable number.

72439219828 is a deficient number, since it is larger than the sum of its proper divisors (58700747312).

72439219828 is a wasteful number, since it uses less digits than its factorization.

72439219828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 624476066 (or 624476064 counting only the distinct ones).

The product of its digits is 3483648, while the sum is 55.

The spelling of 72439219828 in words is "seventy-two billion, four hundred thirty-nine million, two hundred nineteen thousand, eight hundred twenty-eight".