72263891 has 8 divisors (see below), whose sum is σ = 82896480. Its totient is φ = 61708608.

The previous prime is 72263887. The next prime is 72263899. The reversal of 72263891 is 19836227.

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

It is a cyclic number.

It is not a de Polignac number, because 72263891 - 2² = 72263887 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72263899) 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 7 ways as a sum of consecutive naturals, for example, 17306 + ... + 21071.

It is an arithmetic number, because the mean of its divisors is an integer number (10362060).

Almost surely, 2^72263891 is an apocalyptic number.

72263891 is a deficient number, since it is larger than the sum of its proper divisors (10632589).

72263891 is a wasteful number, since it uses less digits than its factorization.

72263891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38653.

The product of its digits is 36288, while the sum is 38.

The square root of 72263891 is about 8500.8170783755. The cubic root of 72263891 is about 416.5243999277.

The spelling of 72263891 in words is "seventy-two million, two hundred sixty-three thousand, eight hundred ninety-one".