1998756 has 60 divisors (see below), whose sum is σ = 5420800. Its totient is φ = 641520.

The previous prime is 1998739. The next prime is 1998761. The reversal of 1998756 is 6578991.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 9945 + ... + 10143.

2^1998756 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1998756, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2710400).

1998756 is an abundant number, since it is smaller than the sum of its proper divisors (3422044).

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

1998756 is a wasteful number, since it uses less digits than its factorization.

1998756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246 (or 235 counting only the distinct ones).

The product of its digits is 136080, while the sum is 45.

The square root of 1998756 is about 1413.7736735418. The cubic root of 1998756 is about 125.9659772085.

The spelling of 1998756 in words is "one million, nine hundred ninety-eight thousand, seven hundred fifty-six".