72266290 has 8 divisors (see below), whose sum is σ = 130079340. Its totient is φ = 28906512.

The previous prime is 72266287. The next prime is 72266297. The reversal of 72266290 is 9266227.

It can be written as a sum of positive squares in 2 ways, for example, as 70711281 + 1555009 = 8409^2 + 1247^2 .

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 (72266297) 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, 3613305 + ... + 3613324.

Almost surely, 2^72266290 is an apocalyptic number.

72266290 is a deficient number, since it is larger than the sum of its proper divisors (57813050).

72266290 is a wasteful number, since it uses less digits than its factorization.

72266290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7226636.

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 72266290 is about 8500.9581812876. The cubic root of 72266290 is about 416.5290091037.

The spelling of 72266290 in words is "seventy-two million, two hundred sixty-six thousand, two hundred ninety".