3987842256 has 30 divisors (see below), whose sum is σ = 11160420050. Its totient is φ = 1329280704.

The previous prime is 3987842213. The next prime is 3987842279. The reversal of 3987842256 is 6522487893.

3987842256 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 3574126656 + 413715600 = 59784^2 + 20340^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13846531 + ... + 13846818.

Almost surely, 2^3987842256 is an apocalyptic number.

3987842256 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

3987842256 is an abundant number, since it is smaller than the sum of its proper divisors (7172577794).

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

3987842256 is a wasteful number, since it uses less digits than its factorization.

3987842256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27693363 (or 27693354 counting only the distinct ones).

The product of its digits is 5806080, while the sum is 54.

The square root of 3987842256 is about 63149.3646523859. The cubic root of 3987842256 is about 1585.7911518341.

The spelling of 3987842256 in words is "three billion, nine hundred eighty-seven million, eight hundred forty-two thousand, two hundred fifty-six".