3806778728080 has 40 divisors (see below), whose sum is σ = 8857659269952. Its totient is φ = 1521524613504.

The previous prime is 3806778727981. The next prime is 3806778728111. The reversal of 3806778728080 is 808278776083.

It is a tau number, because it is divible by the number of its divisors (40).

It is a hoax number, since the sum of its digits (64) coincides with the sum of the digits of its distinct prime factors.

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, 18441684 + ... + 18646963.

Almost surely, 2^{3806778728080} is an apocalyptic number.

It is an amenable number.

3806778728080 is an abundant number, since it is smaller than the sum of its proper divisors (5050880541872).

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

3806778728080 is a wasteful number, since it uses less digits than its factorization.

3806778728080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37089943 (or 37089937 counting only the distinct ones).

The product of its (nonzero) digits is 50577408, while the sum is 64.

The spelling of 3806778728080 in words is "three trillion, eight hundred six billion, seven hundred seventy-eight million, seven hundred twenty-eight thousand, eighty".