7899998 has 8 divisors (see below), whose sum is σ = 11903808. Its totient is φ = 3932064.

The previous prime is 7899989. The next prime is 7900001. The reversal of 7899998 is 8999987.

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

It is a congruent number.

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, 8411 + ... + 9302.

It is an arithmetic number, because the mean of its divisors is an integer number (1487976).

Almost surely, 2^7899998 is an apocalyptic number.

7899998 is a deficient number, since it is larger than the sum of its proper divisors (4003810).

7899998 is a wasteful number, since it uses less digits than its factorization.

7899998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17938.

The product of its digits is 2939328, while the sum is 59.

The square root of 7899998 is about 2810.6935087270. The cubic root of 7899998 is about 199.1631533220.

It can be divided in two parts, 78999 and 98, that added together give a palindrome (79097).

The spelling of 7899998 in words is "seven million, eight hundred ninety-nine thousand, nine hundred ninety-eight".