499721736 has 256 divisors, whose sum is σ = 1492992000. Its totient is φ = 138378240.

The previous prime is 499721723. The next prime is 499721743. The reversal of 499721736 is 637127994.

It is a happy 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, 9428686 + ... + 9428738.

It is an arithmetic number, because the mean of its divisors is an integer number (5832000).

Almost surely, 2^499721736 is an apocalyptic number.

499721736 is a gapful number since it is divisible by the number (46) 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 499721736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (746496000).

499721736 is an abundant number, since it is smaller than the sum of its proper divisors (993270264).

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

499721736 is a wasteful number, since it uses less digits than its factorization.

499721736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164 (or 160 counting only the distinct ones).

The product of its digits is 571536, while the sum is 48.

The square root of 499721736 is about 22354.4567368567. The cubic root of 499721736 is about 793.5532598060.

The spelling of 499721736 in words is "four hundred ninety-nine million, seven hundred twenty-one thousand, seven hundred thirty-six".