998602780 has 96 divisors (see below), whose sum is σ = 2549619072. Its totient is φ = 320716800.

The previous prime is 998602771. The next prime is 998602793. The reversal of 998602780 is 87206899.

It is a happy number.

998602780 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 572710 + ... + 574450.

It is an arithmetic number, because the mean of its divisors is an integer number (26558532).

Almost surely, 2^998602780 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 998602780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1274809536).

998602780 is an abundant number, since it is smaller than the sum of its proper divisors (1551016292).

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

998602780 is a wasteful number, since it uses less digits than its factorization.

998602780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2015 (or 2013 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 49.

The square root of 998602780 is about 31600.6768914845. The cubic root of 998602780 is about 999.5340429177.

The spelling of 998602780 in words is "nine hundred ninety-eight million, six hundred two thousand, seven hundred eighty".