1990098 has 72 divisors (see below), whose sum is σ = 5176080. Its totient is φ = 546480.

The previous prime is 1990081. The next prime is 1990103. The reversal of 1990098 is 8900991.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 86515 + ... + 86537.

It is an arithmetic number, because the mean of its divisors is an integer number (71890).

2^1990098 is an apocalyptic number.

1990098 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 1990098, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2588040).

1990098 is an abundant number, since it is smaller than the sum of its proper divisors (3185982).

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

1990098 is a wasteful number, since it uses less digits than its factorization.

1990098 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84 (or 58 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 36.

The square root of 1990098 is about 1410.7083327180. The cubic root of 1990098 is about 125.7838319198.

It can be divided in two parts, 1 and 990098, that added together give a palindrome (990099).

The spelling of 1990098 in words is "one million, nine hundred ninety thousand, ninety-eight".