998404736 has 64 divisors (see below), whose sum is σ = 2284359360. Its totient is φ = 425779200.

The previous prime is 998404733. The next prime is 998404753. The reversal of 998404736 is 637404899.

It is a tau number, because it is divible by the number of its divisors (64).

It is not an unprimeable number, because it can be changed into a prime (998404733) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 186416 + ... + 191696.

It is an arithmetic number, because the mean of its divisors is an integer number (35693115).

Almost surely, 2^998404736 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 998404736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1142179680).

998404736 is an abundant number, since it is smaller than the sum of its proper divisors (1285954624).

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

998404736 is a wasteful number, since it uses less digits than its factorization.

998404736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5513 (or 5501 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 50.

The square root of 998404736 is about 31597.5431956347. The cubic root of 998404736 is about 999.4679623194.

The spelling of 998404736 in words is "nine hundred ninety-eight million, four hundred four thousand, seven hundred thirty-six".