3387951891 has 12 divisors (see below), whose sum is σ = 4897031880. Its totient is φ = 2257100640.

The previous prime is 3387951887. The next prime is 3387951899. The reversal of 3387951891 is 1981597833.

3387951891 is a `hidden beast` number, since 3 + 38 + 7 + 9 + 518 + 91 = 666.

It is not a de Polignac number, because 3387951891 - 2² = 3387951887 is a prime.

It is a super-2 number, since 2×3387951891² = 22956436031460951762, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3387951899) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 113761 + ... + 140418.

It is an arithmetic number, because the mean of its divisors is an integer number (408085990).

Almost surely, 2^3387951891 is an apocalyptic number.

3387951891 is a deficient number, since it is larger than the sum of its proper divisors (1509079989).

3387951891 is a wasteful number, since it uses less digits than its factorization.

3387951891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255666 (or 255663 counting only the distinct ones).

The product of its digits is 1632960, while the sum is 54.

The square root of 3387951891 is about 58206.1155807532. The cubic root of 3387951891 is about 1501.9163493608.

The spelling of 3387951891 in words is "three billion, three hundred eighty-seven million, nine hundred fifty-one thousand, eight hundred ninety-one".