72222686 has 8 divisors (see below), whose sum is σ = 114035880. Its totient is φ = 34210728.

The previous prime is 72222677. The next prime is 72222697. The reversal of 72222686 is 68622227.

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

It is a super-2 number, since 2×72222686² = 10432232746109192, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 950261 + ... + 950336.

It is an arithmetic number, because the mean of its divisors is an integer number (14254485).

Almost surely, 2^72222686 is an apocalyptic number.

72222686 is a deficient number, since it is larger than the sum of its proper divisors (41813194).

72222686 is a wasteful number, since it uses less digits than its factorization.

72222686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1900618.

The product of its digits is 32256, while the sum is 35.

The square root of 72222686 is about 8498.3931422358. The cubic root of 72222686 is about 416.4452172230.

The spelling of 72222686 in words is "seventy-two million, two hundred twenty-two thousand, six hundred eighty-six".