7147998 has 48 divisors (see below), whose sum is σ = 18201456. Its totient is φ = 1998720.

The previous prime is 7147997. The next prime is 7148023. The reversal of 7147998 is 8997417.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7147991) 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 23 ways as a sum of consecutive naturals, for example, 1186 + ... + 3962.

It is an arithmetic number, because the mean of its divisors is an integer number (379197).

Almost surely, 2^7147998 is an apocalyptic number.

7147998 is a gapful number since it is divisible by the number (78) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 7147998, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9100728).

7147998 is an abundant number, since it is smaller than the sum of its proper divisors (11053458).

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

7147998 is a wasteful number, since it uses less digits than its factorization.

7147998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2809 (or 2806 counting only the distinct ones).

The product of its digits is 127008, while the sum is 45.

The square root of 7147998 is about 2673.5740124410. The cubic root of 7147998 is about 192.6318700637.

The spelling of 7147998 in words is "seven million, one hundred forty-seven thousand, nine hundred ninety-eight".