7643994 has 32 divisors (see below), whose sum is σ = 15966720. Its totient is φ = 2436672.

The previous prime is 7643969. The next prime is 7644001. The reversal of 7643994 is 4993467.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34167 + ... + 34389.

It is an arithmetic number, because the mean of its divisors is an integer number (498960).

Almost surely, 2^7643994 is an apocalyptic number.

7643994 is an abundant number, since it is smaller than the sum of its proper divisors (8322726).

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

7643994 is a wasteful number, since it uses less digits than its factorization.

7643994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 454.

The product of its digits is 163296, while the sum is 42.

The square root of 7643994 is about 2764.7773870603. Note that the first 3 decimals coincide. The cubic root of 7643994 is about 196.9881549562.

The spelling of 7643994 in words is "seven million, six hundred forty-three thousand, nine hundred ninety-four".