1423805868 has 18 divisors (see below), whose sum is σ = 3599064924. Its totient is φ = 474601944.

The previous prime is 1423805749. The next prime is 1423805881. The reversal of 1423805868 is 8685083241.

It is a tau number, because it is divible by the number of its divisors (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 19775046 + ... + 19775117.

Almost surely, 2^1423805868 is an apocalyptic number.

1423805868 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1423805868 is an abundant number, since it is smaller than the sum of its proper divisors (2175259056).

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

1423805868 is a wasteful number, since it uses less digits than its factorization.

1423805868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39550173 (or 39550168 counting only the distinct ones).

The product of its (nonzero) digits is 368640, while the sum is 45.

The square root of 1423805868 is about 37733.3521966973. The cubic root of 1423805868 is about 1124.9941380435.

The spelling of 1423805868 in words is "one billion, four hundred twenty-three million, eight hundred five thousand, eight hundred sixty-eight".