7128998 has 8 divisors (see below), whose sum is σ = 10954440. Its totient is φ = 3477520.

The previous prime is 7128997. The next prime is 7129027. The reversal of 7128998 is 8998217.

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

It is a super-2 number, since 2×7128998² = 101645224968008, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7128991) by changing a digit.

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, 43388 + ... + 43551.

It is an arithmetic number, because the mean of its divisors is an integer number (1369305).

Almost surely, 2^7128998 is an apocalyptic number.

7128998 is a deficient number, since it is larger than the sum of its proper divisors (3825442).

7128998 is a wasteful number, since it uses less digits than its factorization.

7128998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86982.

The product of its digits is 72576, while the sum is 44.

The square root of 7128998 is about 2670.0183519969. The cubic root of 7128998 is about 192.4610411967.

The spelling of 7128998 in words is "seven million, one hundred twenty-eight thousand, nine hundred ninety-eight".