1298880198 has 192 divisors, whose sum is σ = 3704762880. Its totient is φ = 331257600.

The previous prime is 1298880113. The next prime is 1298880199. The reversal of 1298880198 is 8910888921.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1298880199) by changing a digit.

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 95 ways as a sum of consecutive naturals, for example, 2282458 + ... + 2283026.

It is an arithmetic number, because the mean of its divisors is an integer number (19295640).

Almost surely, 2^1298880198 is an apocalyptic number.

1298880198 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1298880198, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1852381440).

1298880198 is an abundant number, since it is smaller than the sum of its proper divisors (2405882682).

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

1298880198 is a wasteful number, since it uses less digits than its factorization.

1298880198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 665 (or 653 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 54.

The square root of 1298880198 is about 36039.9805493843. The cubic root of 1298880198 is about 1091.0794228011.

The spelling of 1298880198 in words is "one billion, two hundred ninety-eight million, eight hundred eighty thousand, one hundred ninety-eight".