1998726 has 32 divisors (see below), whose sum is σ = 4190208. Its totient is φ = 635040.

The previous prime is 1998701. The next prime is 1998727. The reversal of 1998726 is 6278991.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1998727) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15675 + ... + 15801.

It is an arithmetic number, because the mean of its divisors is an integer number (130944).

2^1998726 is an apocalyptic number.

1998726 is an abundant number, since it is smaller than the sum of its proper divisors (2191482).

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

1998726 is a wasteful number, since it uses less digits than its factorization.

1998726 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236.

The product of its digits is 54432, while the sum is 42.

The square root of 1998726 is about 1413.7630636001. The cubic root of 1998726 is about 125.9653469834.

The spelling of 1998726 in words is "one million, nine hundred ninety-eight thousand, seven hundred twenty-six".