72240712 has 8 divisors (see below), whose sum is σ = 135451350. Its totient is φ = 36120352.

The previous prime is 72240709. The next prime is 72240733. The reversal of 72240712 is 21704227.

It can be written as a sum of positive squares in only one way, i.e., 36312676 + 35928036 = 6026^2 + 5994^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 4515037 + ... + 4515052.

Almost surely, 2^72240712 is an apocalyptic number.

It is an amenable number.

72240712 is a deficient number, since it is larger than the sum of its proper divisors (63210638).

72240712 is a wasteful number, since it uses less digits than its factorization.

72240712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9030095 (or 9030091 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 25.

The square root of 72240712 is about 8499.4536294988. The cubic root of 72240712 is about 416.4798610791.

Adding to 72240712 its reverse (21704227), we get a palindrome (93944939).

The spelling of 72240712 in words is "seventy-two million, two hundred forty thousand, seven hundred twelve".