1998600240 has 480 divisors, whose sum is σ = 8228848320. Its totient is φ = 396361728.

The previous prime is 1998600199. The next prime is 1998600269. The reversal of 1998600240 is 420068991.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2598576 + ... + 2599344.

It is an arithmetic number, because the mean of its divisors is an integer number (17143434).

Almost surely, 2^1998600240 is an apocalyptic number.

1998600240 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 1998600240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4114424160).

1998600240 is an abundant number, since it is smaller than the sum of its proper divisors (6230248080).

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

1998600240 is a wasteful number, since it uses less digits than its factorization.

1998600240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 829 (or 816 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 39.

The square root of 1998600240 is about 44705.7070182320. The cubic root of 1998600240 is about 1259.6270501145.

The spelling of 1998600240 in words is "one billion, nine hundred ninety-eight million, six hundred thousand, two hundred forty".