3909851868 has 24 divisors (see below), whose sum is σ = 9824756368. Its totient is φ = 1203031296.

The previous prime is 3909851851. The next prime is 3909851887. The reversal of 3909851868 is 8681589093.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 12531421 + ... + 12531732.

Almost surely, 2^3909851868 is an apocalyptic number.

It is an amenable number.

3909851868 is an abundant number, since it is smaller than the sum of its proper divisors (5914904500).

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

3909851868 is a wasteful number, since it uses less digits than its factorization.

3909851868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25063173 (or 25063171 counting only the distinct ones).

The product of its (nonzero) digits is 3732480, while the sum is 57.

The square root of 3909851868 is about 62528.8083046527. The cubic root of 3909851868 is about 1575.3852243908.

The spelling of 3909851868 in words is "three billion, nine hundred nine million, eight hundred fifty-one thousand, eight hundred sixty-eight".