3818641878 has 48 divisors (see below), whose sum is σ = 8353103616. Its totient is φ = 1260707760.

The previous prime is 3818641829. The next prime is 3818641927. The reversal of 3818641878 is 8781468183.

It is a happy number.

3818641878 is a `hidden beast` number, since 3 + 81 + 86 + 418 + 78 = 666.

It is an interprime number because it is at equal distance from previous prime (3818641829) and next prime (3818641927).

It is a congruent number.

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, 1524375 + ... + 1526877.

It is an arithmetic number, because the mean of its divisors is an integer number (174022992).

Almost surely, 2^3818641878 is an apocalyptic number.

3818641878 is an abundant number, since it is smaller than the sum of its proper divisors (4534461738).

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

3818641878 is a wasteful number, since it uses less digits than its factorization.

3818641878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3289 (or 3286 counting only the distinct ones).

The product of its digits is 2064384, while the sum is 54.

The square root of 3818641878 is about 61795.1606357650. The cubic root of 3818641878 is about 1563.0383855452.

The spelling of 3818641878 in words is "three billion, eight hundred eighteen million, six hundred forty-one thousand, eight hundred seventy-eight".