1918422864 has 30 divisors (see below), whose sum is σ = 5368919946. Its totient is φ = 639474240.

The previous prime is 1918422853. The next prime is 1918422899. The reversal of 1918422864 is 4682248191.

It can be written as a sum of positive squares in only one way, i.e., 1855886400 + 62536464 = 43080^2 + 7908^2 .

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6661047 + ... + 6661334.

Almost surely, 2^1918422864 is an apocalyptic number.

It is an amenable number.

1918422864 is an abundant number, since it is smaller than the sum of its proper divisors (3450497082).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1918422864 is a wasteful number, since it uses less digits than its factorization.

1918422864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13322395 (or 13322386 counting only the distinct ones).

The product of its digits is 221184, while the sum is 45.

The square root of 1918422864 is about 43799.8043831248. The cubic root of 1918422864 is about 1242.5525946966.

The spelling of 1918422864 in words is "one billion, nine hundred eighteen million, four hundred twenty-two thousand, eight hundred sixty-four".