2991278106 has 64 divisors (see below), whose sum is σ = 6778316160. Its totient is φ = 977546880.

The previous prime is 2991278099. The next prime is 2991278113. The reversal of 2991278106 is 6018721992.

It is an interprime number because it is at equal distance from previous prime (2991278099) and next prime (2991278113).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1141710 + ... + 1144326.

It is an arithmetic number, because the mean of its divisors is an integer number (105911190).

Almost surely, 2^2991278106 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2991278106, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3389158080).

2991278106 is an abundant number, since it is smaller than the sum of its proper divisors (3787038054).

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

2991278106 is a wasteful number, since it uses less digits than its factorization.

2991278106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3036 (or 3030 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 45.

The square root of 2991278106 is about 54692.5781619408. The cubic root of 2991278106 is about 1440.8505305246.

The spelling of 2991278106 in words is "two billion, nine hundred ninety-one million, two hundred seventy-eight thousand, one hundred six".