499220820 has 360 divisors, whose sum is σ = 1923435360. Its totient is φ = 107775360.

The previous prime is 499220783. The next prime is 499220851. The reversal of 499220820 is 28022994.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 1508055 + ... + 1508385.

It is an arithmetic number, because the mean of its divisors is an integer number (5342876).

Almost surely, 2^499220820 is an apocalyptic number.

499220820 is the 11172-nd decagonal number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 499220820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (961717680).

499220820 is an abundant number, since it is smaller than the sum of its proper divisors (1424214540).

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

499220820 is a wasteful number, since it uses less digits than its factorization.

499220820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 385 (or 367 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 499220820 is about 22343.2499874123. The cubic root of 499220820 is about 793.2880212490.

The spelling of 499220820 in words is "four hundred ninety-nine million, two hundred twenty thousand, eight hundred twenty".