7871994 has 24 divisors (see below), whose sum is σ = 18368532. Its totient is φ = 2422080.

The previous prime is 7871993. The next prime is 7872001. The reversal of 7871994 is 4991787.

It can be written as a sum of positive squares in 2 ways, for example, as 7868025 + 3969 = 2805^2 + 63^2 .

It is not an unprimeable number, because it can be changed into a prime (7871993) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16587 + ... + 17054.

Almost surely, 2^7871994 is an apocalyptic number.

7871994 is an abundant number, since it is smaller than the sum of its proper divisors (10496538).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7871994 is a wasteful number, since it uses less digits than its factorization.

7871994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33662 (or 33659 counting only the distinct ones).

The product of its digits is 127008, while the sum is 45.

The square root of 7871994 is about 2805.7073974312. The cubic root of 7871994 is about 198.9275427902.

The spelling of 7871994 in words is "seven million, eight hundred seventy-one thousand, nine hundred ninety-four".