72267643 has 8 divisors (see below), whose sum is σ = 82644480. Its totient is φ = 61904040.

The previous prime is 72267641. The next prime is 72267667. The reversal of 72267643 is 34676227.

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 not a de Polignac number, because 72267643 - 2¹ = 72267641 is a prime.

It is a super-2 number, since 2×72267643² = 10445224449550898, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72267641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15678 + ... + 19756.

It is an arithmetic number, because the mean of its divisors is an integer number (10330560).

Almost surely, 2^72267643 is an apocalyptic number.

72267643 is a deficient number, since it is larger than the sum of its proper divisors (10376837).

72267643 is a wasteful number, since it uses less digits than its factorization.

72267643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6617.

The product of its digits is 84672, while the sum is 37.

The square root of 72267643 is about 8501.0377601796. The cubic root of 72267643 is about 416.5316085648.

The spelling of 72267643 in words is "seventy-two million, two hundred sixty-seven thousand, six hundred forty-three".