72396646 has 8 divisors (see below), whose sum is σ = 124108560. Its totient is φ = 31027128.

The previous prime is 72396637. The next prime is 72396647. The reversal of 72396646 is 64669327.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72396647) 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, 2585581 + ... + 2585608.

It is an arithmetic number, because the mean of its divisors is an integer number (15513570).

Almost surely, 2^72396646 is an apocalyptic number.

72396646 is a deficient number, since it is larger than the sum of its proper divisors (51711914).

72396646 is a wasteful number, since it uses less digits than its factorization.

72396646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5171198.

The product of its digits is 326592, while the sum is 43.

The square root of 72396646 is about 8508.6218625580. The cubic root of 72396646 is about 416.7793076439.

The spelling of 72396646 in words is "seventy-two million, three hundred ninety-six thousand, six hundred forty-six".