1998701298 has 128 divisors (see below), whose sum is σ = 5011476480. Its totient is φ = 585144000.

The previous prime is 1998701293. The next prime is 1998701303. The reversal of 1998701298 is 8921078991.

It is an interprime number because it is at equal distance from previous prime (1998701293) and next prime (1998701303).

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

1998701298 is a modest number, since divided by 701298 gives 1998 as remainder.

It is not an unprimeable number, because it can be changed into a prime (1998701293) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4637143 + ... + 4637573.

It is an arithmetic number, because the mean of its divisors is an integer number (39152160).

Almost surely, 2^1998701298 is an apocalyptic number.

1998701298 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 1998701298, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2505738240).

1998701298 is an abundant number, since it is smaller than the sum of its proper divisors (3012775182).

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

1998701298 is a wasteful number, since it uses less digits than its factorization.

1998701298 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 701 (or 695 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 54.

The square root of 1998701298 is about 44706.8372623249. The cubic root of 1998701298 is about 1259.6482805141.

The spelling of 1998701298 in words is "one billion, nine hundred ninety-eight million, seven hundred one thousand, two hundred ninety-eight".