72266291 has 8 divisors (see below), whose sum is σ = 78126480. Its totient is φ = 66611808.

The previous prime is 72266287. The next prime is 72266297. The reversal of 72266291 is 19266227.

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 72266291 - 2² = 72266287 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72266297) 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, 50696 + ... + 52101.

It is an arithmetic number, because the mean of its divisors is an integer number (9765810).

Almost surely, 2^72266291 is an apocalyptic number.

72266291 is a deficient number, since it is larger than the sum of its proper divisors (5860189).

72266291 is a wasteful number, since it uses less digits than its factorization.

72266291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102853.

The product of its digits is 18144, while the sum is 35.

The square root of 72266291 is about 8500.9582401045. The cubic root of 72266291 is about 416.5290110250.

The spelling of 72266291 in words is "seventy-two million, two hundred sixty-six thousand, two hundred ninety-one".