3891400108 has 24 divisors (see below), whose sum is σ = 7176118320. Its totient is φ = 1841302080.

The previous prime is 3891400081. The next prime is 3891400169. The reversal of 3891400108 is 8010041983.

It is a happy number.

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, 44310 + ... + 98722.

It is an arithmetic number, because the mean of its divisors is an integer number (299004930).

Almost surely, 2^3891400108 is an apocalyptic number.

3891400108 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

It is an amenable number.

3891400108 is a deficient number, since it is larger than the sum of its proper divisors (3284718212).

3891400108 is a wasteful number, since it uses less digits than its factorization.

3891400108 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55377 (or 55375 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 34.

The square root of 3891400108 is about 62381.0877430011. The cubic root of 3891400108 is about 1572.9030776520.

The spelling of 3891400108 in words is "three billion, eight hundred ninety-one million, four hundred thousand, one hundred eight".