3960987 has 8 divisors (see below), whose sum is σ = 5559360. Its totient is φ = 2501640.

The previous prime is 3960977. The next prime is 3960997. The reversal of 3960987 is 7890693.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (3960977) and next prime (3960997).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3960987 - 2⁸ = 3960731 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

3960987 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3960937) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34689 + ... + 34802.

It is an arithmetic number, because the mean of its divisors is an integer number (694920).

Almost surely, 2^3960987 is an apocalyptic number.

3960987 is a deficient number, since it is larger than the sum of its proper divisors (1598373).

3960987 is a wasteful number, since it uses less digits than its factorization.

3960987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69513.

The product of its (nonzero) digits is 81648, while the sum is 42.

The square root of 3960987 is about 1990.2228518435. Note that the first 3 decimals coincide. The cubic root of 3960987 is about 158.2223409254. Note that the first 3 decimals are identical.

The spelling of 3960987 in words is "three million, nine hundred sixty thousand, nine hundred eighty-seven".