3887309887 has 4 divisors (see below), whose sum is σ = 3970018656. Its totient is φ = 3804601120.

The previous prime is 3887309863. The next prime is 3887309891. The reversal of 3887309887 is 7889037883.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-3887309887 is a prime.

It is a super-2 number, since 2×3887309887² = 30222356315135905538, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3887309087) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41354314 + ... + 41354407.

It is an arithmetic number, because the mean of its divisors is an integer number (992504664).

Almost surely, 2^3887309887 is an apocalyptic number.

3887309887 is a deficient number, since it is larger than the sum of its proper divisors (82708769).

3887309887 is an equidigital number, since it uses as much as digits as its factorization.

3887309887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82708768.

The product of its (nonzero) digits is 16257024, while the sum is 61.

The square root of 3887309887 is about 62348.2949806969. The cubic root of 3887309887 is about 1572.3517956444.

The spelling of 3887309887 in words is "three billion, eight hundred eighty-seven million, three hundred nine thousand, eight hundred eighty-seven".