499964640 has 288 divisors, whose sum is σ = 1897771680. Its totient is φ = 110186496.

The previous prime is 499964623. The next prime is 499964659. The reversal of 499964640 is 46469994.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 681714 + ... + 682446.

It is an arithmetic number, because the mean of its divisors is an integer number (6589485).

Almost surely, 2^499964640 is an apocalyptic number.

499964640 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 499964640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (948885840).

499964640 is an abundant number, since it is smaller than the sum of its proper divisors (1397807040).

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

499964640 is a wasteful number, since it uses less digits than its factorization.

499964640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 794 (or 779 counting only the distinct ones).

The product of its (nonzero) digits is 1679616, while the sum is 51.

The square root of 499964640 is about 22359.8890873814. The cubic root of 499964640 is about 793.6818153760.

The spelling of 499964640 in words is "four hundred ninety-nine million, nine hundred sixty-four thousand, six hundred forty".