2091087678 has 16 divisors (see below), whose sum is σ = 4279435776. Its totient is φ = 680819160.

The previous prime is 2091087667. The next prime is 2091087683. The reversal of 2091087678 is 8767801902.

It is a super-3 number, since 3×2091087678³ (a number of 29 digits) contains 333 as substring.

It is a congruent 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, 4052238 + ... + 4052753.

It is an arithmetic number, because the mean of its divisors is an integer number (267464736).

Almost surely, 2^2091087678 is an apocalyptic number.

2091087678 is an abundant number, since it is smaller than the sum of its proper divisors (2188348098).

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

2091087678 is a wasteful number, since it uses less digits than its factorization.

2091087678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8105039.

The product of its (nonzero) digits is 338688, while the sum is 48.

The square root of 2091087678 is about 45728.4121526213. The cubic root of 2091087678 is about 1278.7650193692.

The spelling of 2091087678 in words is "two billion, ninety-one million, eighty-seven thousand, six hundred seventy-eight".