72744415 has 8 divisors (see below), whose sum is σ = 87400080. Its totient is φ = 58124352.

The previous prime is 72744403. The next prime is 72744421. The reversal of 72744415 is 51444727.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72744415 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4174 + ... + 12763.

It is an arithmetic number, because the mean of its divisors is an integer number (10925010).

Almost surely, 2^72744415 is an apocalyptic number.

72744415 is a deficient number, since it is larger than the sum of its proper divisors (14655665).

72744415 is a wasteful number, since it uses less digits than its factorization.

72744415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17801.

The product of its digits is 31360, while the sum is 34.

The square root of 72744415 is about 8529.0336498340. The cubic root of 72744415 is about 417.4455975106.

The spelling of 72744415 in words is "seventy-two million, seven hundred forty-four thousand, four hundred fifteen".