499921128 has 192 divisors, whose sum is σ = 1632384000. Its totient is φ = 138015360.

The previous prime is 499921073. The next prime is 499921151. The reversal of 499921128 is 821129994.

It is a super-2 number, since 2×499921128² = 499842268441584768, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

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, 765250 + ... + 765902.

It is an arithmetic number, because the mean of its divisors is an integer number (8502000).

Almost surely, 2^499921128 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 499921128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (816192000).

499921128 is an abundant number, since it is smaller than the sum of its proper divisors (1132462872).

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

499921128 is a wasteful number, since it uses less digits than its factorization.

499921128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 717 (or 696 counting only the distinct ones).

The product of its digits is 93312, while the sum is 45.

The square root of 499921128 is about 22358.9160739066. The cubic root of 499921128 is about 793.6587899576.

The spelling of 499921128 in words is "four hundred ninety-nine million, nine hundred twenty-one thousand, one hundred twenty-eight".