7426188198 has 144 divisors (see below), whose sum is σ = 19622753280. Its totient is φ = 2009966400.

The previous prime is 7426188173. The next prime is 7426188281. The reversal of 7426188198 is 8918816247.

7426188198 is a `hidden beast` number, since 7 + 4 + 2 + 618 + 8 + 19 + 8 = 666.

It is a super-2 number, since 2×7426188198² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1033743 + ... + 1040901.

It is an arithmetic number, because the mean of its divisors is an integer number (136269120).

Almost surely, 2^7426188198 is an apocalyptic number.

7426188198 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 7426188198, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9811376640).

7426188198 is an abundant number, since it is smaller than the sum of its proper divisors (12196565082).

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

7426188198 is a wasteful number, since it uses less digits than its factorization.

7426188198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7235 (or 7219 counting only the distinct ones).

The product of its digits is 1548288, while the sum is 54.

The square root of 7426188198 is about 86175.3340463499. The cubic root of 7426188198 is about 1950.9912293835.

The spelling of 7426188198 in words is "seven billion, four hundred twenty-six million, one hundred eighty-eight thousand, one hundred ninety-eight".