3990987135 has 12 divisors (see below), whose sum is σ = 6917711112. Its totient is φ = 2128526448.

The previous prime is 3990987131. The next prime is 3990987139. The reversal of 3990987135 is 5317890993.

It is an interprime number because it is at equal distance from previous prime (3990987131) and next prime (3990987139).

It is not a de Polignac number, because 3990987135 - 2² = 3990987131 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3990987131) 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, 44344257 + ... + 44344346.

It is an arithmetic number, because the mean of its divisors is an integer number (576475926).

Almost surely, 2^3990987135 is an apocalyptic number.

3990987135 is a deficient number, since it is larger than the sum of its proper divisors (2926723977).

3990987135 is a wasteful number, since it uses less digits than its factorization.

3990987135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88688614 (or 88688611 counting only the distinct ones).

The product of its (nonzero) digits is 1837080, while the sum is 54.

The square root of 3990987135 is about 63174.2600668975. The cubic root of 3990987135 is about 1586.2079027627.

The spelling of 3990987135 in words is "three billion, nine hundred ninety million, nine hundred eighty-seven thousand, one hundred thirty-five".