3851398989 has 32 divisors (see below), whose sum is σ = 5799997440. Its totient is φ = 2525322096.

The previous prime is 3851398961. The next prime is 3851399003. The reversal of 3851398989 is 9898931583.

3851398989 is a `hidden beast` number, since 38 + 513 + 9 + 8 + 9 + 89 = 666.

It is not a de Polignac number, because 3851398989 - 2¹² = 3851394893 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3851398939) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1559934 + ... + 1562400.

It is an arithmetic number, because the mean of its divisors is an integer number (181249920).

Almost surely, 2^3851398989 is an apocalyptic number.

It is an amenable number.

3851398989 is a deficient number, since it is larger than the sum of its proper divisors (1948598451).

3851398989 is a wasteful number, since it uses less digits than its factorization.

3851398989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3406 (or 3400 counting only the distinct ones).

The product of its digits is 16796160, while the sum is 63.

The square root of 3851398989 is about 62059.6405806543. The cubic root of 3851398989 is about 1567.4950234498.

The spelling of 3851398989 in words is "three billion, eight hundred fifty-one million, three hundred ninety-eight thousand, nine hundred eighty-nine".