3891108078 has 192 divisors, whose sum is σ = 10778745600. Its totient is φ = 1030708800.

The previous prime is 3891108073. The next prime is 3891108101. The reversal of 3891108078 is 8708011983.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3891108073) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1612693 + ... + 1615103.

It is an arithmetic number, because the mean of its divisors is an integer number (56139300).

Almost surely, 2^3891108078 is an apocalyptic number.

3891108078 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 3891108078, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5389372800).

3891108078 is an abundant number, since it is smaller than the sum of its proper divisors (6887637522).

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

3891108078 is a wasteful number, since it uses less digits than its factorization.

3891108078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2476 (or 2459 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 45.

The square root of 3891108078 is about 62378.7470056910. The cubic root of 3891108078 is about 1572.8637305136.

The spelling of 3891108078 in words is "three billion, eight hundred ninety-one million, one hundred eight thousand, seventy-eight".