499991800 has 96 divisors (see below), whose sum is σ = 1449371520. Its totient is φ = 155836800.

The previous prime is 499991773. The next prime is 499991801. The reversal of 499991800 is 8199994.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (499991801) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 834 + ... + 31633.

It is an arithmetic number, because the mean of its divisors is an integer number (15097620).

Almost surely, 2^499991800 is an apocalyptic number.

499991800 is a gapful number since it is divisible by the number (40) 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 499991800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (724685760).

499991800 is an abundant number, since it is smaller than the sum of its proper divisors (949379720).

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

499991800 is a wasteful number, since it uses less digits than its factorization.

499991800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32501 (or 32492 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 49.

The square root of 499991800 is about 22360.4964166720. The cubic root of 499991800 is about 793.6961870642.

It can be divided in two parts, 499 and 991800, that added together give a palindrome (992299).

The spelling of 499991800 in words is "four hundred ninety-nine million, nine hundred ninety-one thousand, eight hundred".