72304442547440 has 40 divisors (see below), whose sum is σ = 168109440301248. Its totient is φ = 28921499792640.

The previous prime is 72304442547427. The next prime is 72304442547527. The reversal of 72304442547440 is 4474524440327.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4170185 + ... + 12727895.

Almost surely, 2^{72304442547440} is an apocalyptic number.

It is an amenable number.

72304442547440 is an abundant number, since it is smaller than the sum of its proper divisors (95804997753808).

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

72304442547440 is a wasteful number, since it uses less digits than its factorization.

72304442547440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8663337 (or 8663331 counting only the distinct ones).

The product of its (nonzero) digits is 12042240, while the sum is 50.

Adding to 72304442547440 its reverse (4474524440327), we get a palindrome (76778966987767).

The spelling of 72304442547440 in words is "seventy-two trillion, three hundred four billion, four hundred forty-two million, five hundred forty-seven thousand, four hundred forty".