7887904994 has 8 divisors (see below), whose sum is σ = 11964799980. Its totient is φ = 3899638336.

The previous prime is 7887904961. The next prime is 7887905033. The reversal of 7887904994 is 4994097887.

It can be written as a sum of positive squares in 2 ways, for example, as 7887748969 + 156025 = 88813^2 + 395^2 .

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

It is a super-3 number, since 3×7887904994³ (a number of 31 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 7887904994.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22156859 + ... + 22157214.

Almost surely, 2^7887904994 is an apocalyptic number.

7887904994 is a deficient number, since it is larger than the sum of its proper divisors (4076894986).

7887904994 is a wasteful number, since it uses less digits than its factorization.

7887904994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44314164.

The product of its (nonzero) digits is 36578304, while the sum is 65.

The square root of 7887904994 is about 88813.8783862072. The cubic root of 7887904994 is about 1990.6147771858.

The spelling of 7887904994 in words is "seven billion, eight hundred eighty-seven million, nine hundred four thousand, nine hundred ninety-four".