3990115989 has 24 divisors (see below), whose sum is σ = 5956704000. Its totient is φ = 2571117120.

The previous prime is 3990115973. The next prime is 3990116017. The reversal of 3990115989 is 9895110993.

3990115989 is a `hidden beast` number, since 39 + 9 + 0 + 11 + 598 + 9 = 666.

It is not a de Polignac number, because 3990115989 - 2⁴ = 3990115973 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 (3990115949) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 231337 + ... + 247985.

It is an arithmetic number, because the mean of its divisors is an integer number (248196000).

Almost surely, 2^3990115989 is an apocalyptic number.

It is an amenable number.

3990115989 is a deficient number, since it is larger than the sum of its proper divisors (1966588011).

3990115989 is a wasteful number, since it uses less digits than its factorization.

3990115989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17545 (or 17542 counting only the distinct ones).

The product of its (nonzero) digits is 787320, while the sum is 54.

The square root of 3990115989 is about 63167.3649046721. The cubic root of 3990115989 is about 1586.0924827613.

The spelling of 3990115989 in words is "three billion, nine hundred ninety million, one hundred fifteen thousand, nine hundred eighty-nine".