1198638230790 has 288 divisors, whose sum is σ = 3953047919616. Its totient is φ = 229908107520.

The previous prime is 1198638230773. The next prime is 1198638230821. The reversal of 1198638230790 is 970328368911.

It is a super-2 number, since 2×1198638230790² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1198638230790.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 2513419 + ... + 2952041.

It is an arithmetic number, because the mean of its divisors is an integer number (13725860832).

Almost surely, 2^{1198638230790} is an apocalyptic number.

1198638230790 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1198638230790, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1976523959808).

1198638230790 is an abundant number, since it is smaller than the sum of its proper divisors (2754409688826).

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

1198638230790 is a wasteful number, since it uses less digits than its factorization.

1198638230790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 438684 (or 438664 counting only the distinct ones).

The product of its (nonzero) digits is 3919104, while the sum is 57.

The spelling of 1198638230790 in words is "one trillion, one hundred ninety-eight billion, six hundred thirty-eight million, two hundred thirty thousand, seven hundred ninety".