3806987778 has 48 divisors (see below), whose sum is σ = 9052295616. Its totient is φ = 1146714720.

The previous prime is 3806987713. The next prime is 3806987783. The reversal of 3806987778 is 8777896083.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24501 + ... + 90632.

It is an arithmetic number, because the mean of its divisors is an integer number (188589492).

Almost surely, 2^3806987778 is an apocalyptic number.

3806987778 is an abundant number, since it is smaller than the sum of its proper divisors (5245307838).

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

3806987778 is a wasteful number, since it uses less digits than its factorization.

3806987778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115319 (or 115316 counting only the distinct ones).

The product of its (nonzero) digits is 28449792, while the sum is 63.

The square root of 3806987778 is about 61700.7923612007. The cubic root of 3806987778 is about 1561.4466880576.

The spelling of 3806987778 in words is "three billion, eight hundred six million, nine hundred eighty-seven thousand, seven hundred seventy-eight".