2391778086 has 16 divisors (see below), whose sum is σ = 4804089264. Its totient is φ = 793837184.

The previous prime is 2391778063. The next prime is 2391778099. The reversal of 2391778086 is 6808771932.

2391778086 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 854031 + ... + 856826.

It is an arithmetic number, because the mean of its divisors is an integer number (300255579).

Almost surely, 2^2391778086 is an apocalyptic number.

2391778086 is an abundant number, since it is smaller than the sum of its proper divisors (2412311178).

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

2391778086 is a wasteful number, since it uses less digits than its factorization.

2391778086 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1711095.

The product of its (nonzero) digits is 1016064, while the sum is 51.

The square root of 2391778086 is about 48905.8083053537. The cubic root of 2391778086 is about 1337.3352564551.

The spelling of 2391778086 in words is "two billion, three hundred ninety-one million, seven hundred seventy-eight thousand, eighty-six".