3987667408 has 40 divisors (see below), whose sum is σ = 8254169120. Its totient is φ = 1860693120.

The previous prime is 3987667363. The next prime is 3987667433. The reversal of 3987667408 is 8047667893.

It is a happy number.

It is a congruent number.

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, 77523 + ... + 118258.

It is an arithmetic number, because the mean of its divisors is an integer number (206354228).

Almost surely, 2^3987667408 is an apocalyptic number.

3987667408 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

It is an amenable number.

3987667408 is an abundant number, since it is smaller than the sum of its proper divisors (4266501712).

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

3987667408 is a wasteful number, since it uses less digits than its factorization.

3987667408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195875 (or 195869 counting only the distinct ones).

The product of its (nonzero) digits is 12192768, while the sum is 58.

The square root of 3987667408 is about 63147.9802369007. The cubic root of 3987667408 is about 1585.7679750177.

The spelling of 3987667408 in words is "three billion, nine hundred eighty-seven million, six hundred sixty-seven thousand, four hundred eight".