7887994 has 8 divisors (see below), whose sum is σ = 11907828. Its totient is φ = 3918720.

The previous prime is 7887989. The next prime is 7888007. The reversal of 7887994 is 4997887.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 7756225 + 131769 = 2785^2 + 363^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12247 + ... + 12874.

Almost surely, 2^7887994 is an apocalyptic number.

7887994 is a deficient number, since it is larger than the sum of its proper divisors (4019834).

7887994 is a wasteful number, since it uses less digits than its factorization.

7887994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25280.

The product of its digits is 1016064, while the sum is 52.

The square root of 7887994 is about 2808.5572808828. The cubic root of 7887994 is about 199.0622264429.

The spelling of 7887994 in words is "seven million, eight hundred eighty-seven thousand, nine hundred ninety-four".