72281266 has 8 divisors (see below), whose sum is σ = 109949184. Its totient is φ = 35631540.

The previous prime is 72281233. The next prime is 72281267. The reversal of 72281266 is 66218227.

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

It is not an unprimeable number, because it can be changed into a prime (72281267) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 254370 + ... + 254653.

It is an arithmetic number, because the mean of its divisors is an integer number (13743648).

Almost surely, 2^72281266 is an apocalyptic number.

72281266 is a deficient number, since it is larger than the sum of its proper divisors (37667918).

72281266 is a wasteful number, since it uses less digits than its factorization.

72281266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 509096.

The product of its digits is 16128, while the sum is 34.

The square root of 72281266 is about 8501.8389775389. The cubic root of 72281266 is about 416.5577800451.

The spelling of 72281266 in words is "seventy-two million, two hundred eighty-one thousand, two hundred sixty-six".