7993998 has 32 divisors (see below), whose sum is σ = 18249120. Its totient is φ = 2592000.

The previous prime is 7993987. The next prime is 7994017. The reversal of 7993998 is 8993997.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

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, 3 + ... + 3998.

It is an arithmetic number, because the mean of its divisors is an integer number (570285).

Almost surely, 2^7993998 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7993998, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9124560).

7993998 is an abundant number, since it is smaller than the sum of its proper divisors (10255122).

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

7993998 is a wasteful number, since it uses less digits than its factorization.

7993998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4049 (or 4043 counting only the distinct ones).

The product of its digits is 1102248, while the sum is 54.

The square root of 7993998 is about 2827.3659119399. The cubic root of 7993998 is about 199.9499708198.

Subtracting 7993998 from its reverse (8993997), we obtain a palindrome (999999).

The spelling of 7993998 in words is "seven million, nine hundred ninety-three thousand, nine hundred ninety-eight".