999800598 has 16 divisors (see below), whose sum is σ = 2011870656. Its totient is φ = 331221960.

The previous prime is 999800597. The next prime is 999800687. The reversal of 999800598 is 895008999.

It is a super-2 number, since 2×999800598² = 1999202471522315208, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999800597) 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, 510168 + ... + 512123.

It is an arithmetic number, because the mean of its divisors is an integer number (125741916).

Almost surely, 2^999800598 is an apocalyptic number.

999800598 is an abundant number, since it is smaller than the sum of its proper divisors (1012070058).

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

999800598 is a wasteful number, since it uses less digits than its factorization.

999800598 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1022459.

The product of its (nonzero) digits is 2099520, while the sum is 57.

The square root of 999800598 is about 31619.6236220484. The cubic root of 999800598 is about 999.9335282483.

The spelling of 999800598 in words is "nine hundred ninety-nine million, eight hundred thousand, five hundred ninety-eight".