3987770864 has 120 divisors (see below), whose sum is σ = 9943884384. Its totient is φ = 1515571200.

The previous prime is 3987770849. The next prime is 3987770881. The reversal of 3987770864 is 4680777893.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 552044 + ... + 559220.

Almost surely, 2^3987770864 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3987770864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4971942192).

3987770864 is an abundant number, since it is smaller than the sum of its proper divisors (5956113520).

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

3987770864 is a wasteful number, since it uses less digits than its factorization.

3987770864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7255 (or 7238 counting only the distinct ones).

The product of its (nonzero) digits is 14224896, while the sum is 59.

The square root of 3987770864 is about 63148.7993868450. The cubic root of 3987770864 is about 1585.7816886148.

The spelling of 3987770864 in words is "three billion, nine hundred eighty-seven million, seven hundred seventy thousand, eight hundred sixty-four".