3987641880 has 64 divisors (see below), whose sum is σ = 13292143200. Its totient is φ = 1063370880.

The previous prime is 3987641831. The next prime is 3987641887. The reversal of 3987641880 is 881467893.

3987641880 is a `hidden beast` number, since 398 + 76 + 4 + 188 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3987641887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1845051 + ... + 1847210.

Almost surely, 2^3987641880 is an apocalyptic number.

3987641880 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3987641880 is an abundant number, since it is smaller than the sum of its proper divisors (9304501320).

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

3987641880 is a wasteful number, since it uses less digits than its factorization.

3987641880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3692281 (or 3692271 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 54.

The square root of 3987641880 is about 63147.7781081805. The cubic root of 3987641880 is about 1585.7645911204.

The spelling of 3987641880 in words is "three billion, nine hundred eighty-seven million, six hundred forty-one thousand, eight hundred eighty".