123220286 has 16 divisors (see below), whose sum is σ = 216944736. Its totient is φ = 51381216.

The previous prime is 123220259. The next prime is 123220289. The reversal of 123220286 is 682022321.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123220289) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 118421 + ... + 119456.

It is an arithmetic number, because the mean of its divisors is an integer number (13559046).

Almost surely, 2^123220286 is an apocalyptic number.

123220286 is a deficient number, since it is larger than the sum of its proper divisors (93724450).

123220286 is a wasteful number, since it uses less digits than its factorization.

123220286 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237923.

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 123220286 is about 11100.4633236636. The cubic root of 123220286 is about 497.6156962641.

The spelling of 123220286 in words is "one hundred twenty-three million, two hundred twenty thousand, two hundred eighty-six".