3871988394 has 16 divisors (see below), whose sum is σ = 7747518432. Its totient is φ = 1290072528.

The previous prime is 3871988387. The next prime is 3871988411. The reversal of 3871988394 is 4938891783.

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, 133249 + ... + 159684.

It is an arithmetic number, because the mean of its divisors is an integer number (484219902).

Almost surely, 2^3871988394 is an apocalyptic number.

3871988394 is an abundant number, since it is smaller than the sum of its proper divisors (3875530038).

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

3871988394 is a wasteful number, since it uses less digits than its factorization.

3871988394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295141.

The product of its digits is 10450944, while the sum is 60.

The square root of 3871988394 is about 62225.3034866042. The cubic root of 3871988394 is about 1570.2833131733.

The spelling of 3871988394 in words is "three billion, eight hundred seventy-one million, nine hundred eighty-eight thousand, three hundred ninety-four".