998231040 has 440 divisors, whose sum is σ = 3745027440. Its totient is φ = 253919232.

The previous prime is 998231033. The next prime is 998231051. The reversal of 998231040 is 40132899.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 998230986 and 998231004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 12026839 + ... + 12026921.

It is an arithmetic number, because the mean of its divisors is an integer number (8511426).

Almost surely, 2^998231040 is an apocalyptic number.

998231040 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 998231040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1872513720).

998231040 is an abundant number, since it is smaller than the sum of its proper divisors (2746796400).

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

998231040 is a wasteful number, since it uses less digits than its factorization.

998231040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149 (or 122 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 998231040 is about 31594.7945079565. The cubic root of 998231040 is about 999.4099986335.

The spelling of 998231040 in words is "nine hundred ninety-eight million, two hundred thirty-one thousand, forty".