7890987 has 16 divisors (see below), whose sum is σ = 11723040. Its totient is φ = 4687872.

The previous prime is 7890979. The next prime is 7890989.

7890987 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 7890987 - 2³ = 7890979 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (7890989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2358 + ... + 4619.

It is an arithmetic number, because the mean of its divisors is an integer number (732690).

Almost surely, 2^7890987 is an apocalyptic number.

7890987 is a deficient number, since it is larger than the sum of its proper divisors (3832053).

7890987 is a wasteful number, since it uses less digits than its factorization.

7890987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7022.

The product of its (nonzero) digits is 254016, while the sum is 48.

The square root of 7890987 is about 2809.0900661958. The cubic root of 7890987 is about 199.0874004776.

The spelling of 7890987 in words is "seven million, eight hundred ninety thousand, nine hundred eighty-seven".