499409820 has 192 divisors, whose sum is σ = 1912458240. Its totient is φ = 105359616.

The previous prime is 499409773. The next prime is 499409837. The reversal of 499409820 is 28904994.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 44059 + ... + 54221.

It is an arithmetic number, because the mean of its divisors is an integer number (9960720).

Almost surely, 2^499409820 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 499409820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (956229120).

499409820 is an abundant number, since it is smaller than the sum of its proper divisors (1413048420).

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

499409820 is a wasteful number, since it uses less digits than its factorization.

499409820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10201 (or 10193 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 45.

The square root of 499409820 is about 22347.4790524569. The cubic root of 499409820 is about 793.3881189166.

The spelling of 499409820 in words is "four hundred ninety-nine million, four hundred nine thousand, eight hundred twenty".