72741638 has 8 divisors (see below), whose sum is σ = 111650088. Its totient is φ = 35524944.

The previous prime is 72741637. The next prime is 72741661. The reversal of 72741638 is 83614727.

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

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72741637) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 422831 + ... + 423002.

It is an arithmetic number, because the mean of its divisors is an integer number (13956261).

Almost surely, 2^72741638 is an apocalyptic number.

72741638 is a deficient number, since it is larger than the sum of its proper divisors (38908450).

72741638 is a wasteful number, since it uses less digits than its factorization.

72741638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 845878.

The product of its digits is 56448, while the sum is 38.

The square root of 72741638 is about 8528.8708514082. The cubic root of 72741638 is about 417.4402854822.

The spelling of 72741638 in words is "seventy-two million, seven hundred forty-one thousand, six hundred thirty-eight".