7421689998 has 24 divisors (see below), whose sum is σ = 16081914888. Its totient is φ = 2473652592.

The previous prime is 7421689993. The next prime is 7421690041. The reversal of 7421689998 is 8999861247.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7421689993) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 334065 + ... + 355587.

It is an arithmetic number, because the mean of its divisors is an integer number (670079787).

Almost surely, 2^7421689998 is an apocalyptic number.

7421689998 is an abundant number, since it is smaller than the sum of its proper divisors (8660224890).

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

7421689998 is a wasteful number, since it uses less digits than its factorization.

7421689998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40688 (or 40685 counting only the distinct ones).

The product of its digits is 15676416, while the sum is 63.

The square root of 7421689998 is about 86149.2309774150. The cubic root of 7421689998 is about 1950.5972308728.

The spelling of 7421689998 in words is "seven billion, four hundred twenty-one million, six hundred eighty-nine thousand, nine hundred ninety-eight".