3881278773 has 12 divisors (see below), whose sum is σ = 5850043680. Its totient is φ = 2475018216.

The previous prime is 3881278763. The next prime is 3881278787. The reversal of 3881278773 is 3778721883.

It is a happy number.

It is not a de Polignac number, because 3881278773 - 2⁴ = 3881278757 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3881278703) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9374863 + ... + 9375276.

It is an arithmetic number, because the mean of its divisors is an integer number (487503640).

Almost surely, 2^3881278773 is an apocalyptic number.

It is an amenable number.

3881278773 is a deficient number, since it is larger than the sum of its proper divisors (1968764907).

3881278773 is a wasteful number, since it uses less digits than its factorization.

3881278773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18750168 (or 18750165 counting only the distinct ones).

The product of its digits is 3161088, while the sum is 54.

The square root of 3881278773 is about 62299.9098956010. The cubic root of 3881278773 is about 1571.5382131838.

It can be divided in two parts, 388127 and 8773, that added together give a square (396900 = 630²).

The spelling of 3881278773 in words is "three billion, eight hundred eighty-one million, two hundred seventy-eight thousand, seven hundred seventy-three".