499212820 has 36 divisors (see below), whose sum is σ = 1113654780. Its totient is φ = 187936768.

The previous prime is 499212799. The next prime is 499212823. The reversal of 499212820 is 28212994.

It can be written as a sum of positive squares in 6 ways, for example, as 8678916 + 490533904 = 2946^2 + 22148^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 499212820.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (499212823) 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, 37405 + ... + 48964.

It is an arithmetic number, because the mean of its divisors is an integer number (30934855).

Almost surely, 2^499212820 is an apocalyptic number.

It is an amenable number.

499212820 is an abundant number, since it is smaller than the sum of its proper divisors (614441960).

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

499212820 is a wasteful number, since it uses less digits than its factorization.

499212820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86412 (or 86393 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 499212820 is about 22343.0709617098. The cubic root of 499212820 is about 793.2837837534.

The spelling of 499212820 in words is "four hundred ninety-nine million, two hundred twelve thousand, eight hundred twenty".