1998707800 has 24 divisors (see below), whose sum is σ = 4646996100. Its totient is φ = 799483040.

The previous prime is 1998707779. The next prime is 1998707801. The reversal of 1998707800 is 87078991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1998707801) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4996570 + ... + 4996969.

Almost surely, 2^1998707800 is an apocalyptic number.

1998707800 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1998707800 is an abundant number, since it is smaller than the sum of its proper divisors (2648288300).

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

1998707800 is a wasteful number, since it uses less digits than its factorization.

1998707800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9993555 (or 9993546 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 49.

The square root of 1998707800 is about 44706.9099804493. The cubic root of 1998707800 is about 1259.6496464384.

The spelling of 1998707800 in words is "one billion, nine hundred ninety-eight million, seven hundred seven thousand, eight hundred".