1998704480 has 96 divisors (see below), whose sum is σ = 4870774944. Its totient is φ = 774475776.

The previous prime is 1998704431. The next prime is 1998704507. The reversal of 1998704480 is 844078991.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1674764 + ... + 1675956.

It is an arithmetic number, because the mean of its divisors is an integer number (50737239).

Almost surely, 2^1998704480 is an apocalyptic number.

1998704480 is a gapful number since it is divisible by the number (10) 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 1998704480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2435387472).

1998704480 is an abundant number, since it is smaller than the sum of its proper divisors (2872070464).

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

1998704480 is a wasteful number, since it uses less digits than its factorization.

1998704480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1528 (or 1520 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 50.

The square root of 1998704480 is about 44706.8728497085. The cubic root of 1998704480 is about 1259.6489489813.

The spelling of 1998704480 in words is "one billion, nine hundred ninety-eight million, seven hundred four thousand, four hundred eighty".