1998000500 has 36 divisors (see below), whose sum is σ = 4365817092. Its totient is φ = 798800400.

The previous prime is 1998000493. The next prime is 1998000509. The reversal of 1998000500 is 50008991.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 63936016 + 1934064484 = 7996^2 + 43978^2 .

It is a super-4 number, since 4×1998000500⁴ (a number of 38 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1998000509) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 998501 + ... + 1000499.

It is an arithmetic number, because the mean of its divisors is an integer number (121272697).

Almost surely, 2^1998000500 is an apocalyptic number.

1998000500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1998000500 is an abundant number, since it is smaller than the sum of its proper divisors (2367816592).

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

1998000500 is an frugal number, since it uses more digits than its factorization.

1998000500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4017 (or 2006 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 32.

The square root of 1998000500 is about 44698.9988702208. The cubic root of 1998000500 is about 1259.5010412060.

The spelling of 1998000500 in words is "one billion, nine hundred ninety-eight million, five hundred", and thus it is an aban number.