7979994 has 48 divisors (see below), whose sum is σ = 19341504. Its totient is φ = 2356800.

The previous prime is 7979969. The next prime is 7980013. The reversal of 7979994 is 4999797.

It is a self number, because there is not a number n which added to its sum of digits gives 7979994.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7627 + ... + 8609.

It is an arithmetic number, because the mean of its divisors is an integer number (402948).

Almost surely, 2^7979994 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7979994, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9670752).

7979994 is an abundant number, since it is smaller than the sum of its proper divisors (11361510).

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

7979994 is a wasteful number, since it uses less digits than its factorization.

7979994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1043 (or 1040 counting only the distinct ones).

The product of its digits is 1285956, while the sum is 54.

The square root of 7979994 is about 2824.8883163764. Note that the first 3 decimals coincide. The cubic root of 7979994 is about 199.8331441677.

The spelling of 7979994 in words is "seven million, nine hundred seventy-nine thousand, nine hundred ninety-four".