4002001987 has 8 divisors (see below), whose sum is σ = 4075315200. Its totient is φ = 3929255304.

The previous prime is 4002001973. The next prime is 4002002021. The reversal of 4002001987 is 7891002004.

4002001987 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 4002001987 - 2⁷ = 4002001859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4002001937) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 127363 + ... + 155644.

It is an arithmetic number, because the mean of its divisors is an integer number (509414400).

Almost surely, 2^4002001987 is an apocalyptic number.

4002001987 is a deficient number, since it is larger than the sum of its proper divisors (73313213).

4002001987 is a wasteful number, since it uses less digits than its factorization.

4002001987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283265.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 4002001987 is about 63261.3783204255. The cubic root of 4002001987 is about 1587.6658374875.

The spelling of 4002001987 in words is "four billion, two million, one thousand, nine hundred eighty-seven".