3878778783 has 48 divisors (see below), whose sum is σ = 5894985600. Its totient is φ = 2265024960.

The previous prime is 3878778779. The next prime is 3878778791.

3878778783 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 3878778783 - 2² = 3878778779 is a prime.

It is a super-2 number, since 2×3878778783² = 30089849694901922178, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3878778713) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1435768 + ... + 1438466.

It is an arithmetic number, because the mean of its divisors is an integer number (122812200).

Almost surely, 2^3878778783 is an apocalyptic number.

3878778783 is a gapful number since it is divisible by the number (33) formed by its first and last digit.

3878778783 is a deficient number, since it is larger than the sum of its proper divisors (2016206817).

3878778783 is a wasteful number, since it uses less digits than its factorization.

3878778783 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2868 (or 2857 counting only the distinct ones).

The product of its digits is 88510464, while the sum is 66.

The square root of 3878778783 is about 62279.8425094348. The cubic root of 3878778783 is about 1571.2007235841.

The spelling of 3878778783 in words is "three billion, eight hundred seventy-eight million, seven hundred seventy-eight thousand, seven hundred eighty-three".