7890330987 has 144 divisors (see below), whose sum is σ = 15603517440. Its totient is φ = 3918831840.

The previous prime is 7890330961. The next prime is 7890331013.

7890330987 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (7890330961) and next prime (7890331013).

It is not a de Polignac number, because 7890330987 - 2⁶ = 7890330923 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7890330937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 3680838 + ... + 3682980.

It is an arithmetic number, because the mean of its divisors is an integer number (108357760).

Almost surely, 2^7890330987 is an apocalyptic number.

7890330987 is a gapful number since it is divisible by the number (77) formed by its first and last digit.

7890330987 is a deficient number, since it is larger than the sum of its proper divisors (7713186453).

7890330987 is a wasteful number, since it uses less digits than its factorization.

7890330987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2211 (or 2187 counting only the distinct ones).

The product of its (nonzero) digits is 2286144, while the sum is 54.

The square root of 7890330987 is about 88827.5350721836. The cubic root of 7890330987 is about 1990.8188331641.

The spelling of 7890330987 in words is "seven billion, eight hundred ninety million, three hundred thirty thousand, nine hundred eighty-seven".