1423661218 has 16 divisors (see below), whose sum is σ = 2447812224. Its totient is φ = 608328000.

The previous prime is 1423661201. The next prime is 1423661227. The reversal of 1423661218 is 8121663241.

It is a super-2 number, since 2×1423661218² = 4053622527274487048, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 146158 + ... + 155593.

It is an arithmetic number, because the mean of its divisors is an integer number (152988264).

Almost surely, 2^1423661218 is an apocalyptic number.

1423661218 is a deficient number, since it is larger than the sum of its proper divisors (1024151006).

1423661218 is a wasteful number, since it uses less digits than its factorization.

1423661218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302097.

The product of its digits is 13824, while the sum is 34.

The square root of 1423661218 is about 37731.4354086881. The cubic root of 1423661218 is about 1124.9560392369.

The spelling of 1423661218 in words is "one billion, four hundred twenty-three million, six hundred sixty-one thousand, two hundred eighteen".