999998260 has 48 divisors (see below), whose sum is σ = 2162203344. Its totient is φ = 388205568.

The previous prime is 999998243. The next prime is 999998261. The reversal of 999998260 is 62899999.

It can be written as a sum of positive squares in 8 ways, for example, as 36144144 + 963854116 = 6012^2 + 31046^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999998261) 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, 336702 + ... + 339658.

It is an arithmetic number, because the mean of its divisors is an integer number (45045903).

Almost surely, 2^999998260 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 999998260, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1081101672).

999998260 is an abundant number, since it is smaller than the sum of its proper divisors (1162205084).

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

999998260 is a wasteful number, since it uses less digits than its factorization.

999998260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3460 (or 3458 counting only the distinct ones).

The product of its (nonzero) digits is 5668704, while the sum is 61.

The square root of 999998260 is about 31622.7490898562. The cubic root of 999998260 is about 999.9994199997. Note that the first 3 decimals are identical.

The spelling of 999998260 in words is "nine hundred ninety-nine million, nine hundred ninety-eight thousand, two hundred sixty".