7129998 has 48 divisors (see below), whose sum is σ = 16514160. Its totient is φ = 2280096.

The previous prime is 7129877. The next prime is 7130003. The reversal of 7129998 is 8999217.

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 23 ways as a sum of consecutive naturals, for example, 45336 + ... + 45492.

It is an arithmetic number, because the mean of its divisors is an integer number (344045).

Almost surely, 2^7129998 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7129998, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8257080).

7129998 is an abundant number, since it is smaller than the sum of its proper divisors (9384162).

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

7129998 is a wasteful number, since it uses less digits than its factorization.

7129998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226 (or 191 counting only the distinct ones).

The product of its digits is 81648, while the sum is 45.

The square root of 7129998 is about 2670.2056100608. The cubic root of 7129998 is about 192.4700397518.

The spelling of 7129998 in words is "seven million, one hundred twenty-nine thousand, nine hundred ninety-eight".