72328616 has 8 divisors (see below), whose sum is σ = 135616170. Its totient is φ = 36164304.

The previous prime is 72328601. The next prime is 72328621. The reversal of 72328616 is 61682327.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 37871716 + 34456900 = 6154^2 + 5870^2 .

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 (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4520531 + ... + 4520546.

Almost surely, 2^72328616 is an apocalyptic number.

It is an amenable number.

72328616 is a deficient number, since it is larger than the sum of its proper divisors (63287554).

72328616 is a wasteful number, since it uses less digits than its factorization.

72328616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9041083 (or 9041079 counting only the distinct ones).

The product of its digits is 24192, while the sum is 35.

The square root of 72328616 is about 8504.6232132882. The cubic root of 72328616 is about 416.6487197248.

The spelling of 72328616 in words is "seventy-two million, three hundred twenty-eight thousand, six hundred sixteen".