499725128 has 96 divisors (see below), whose sum is σ = 1130241600. Its totient is φ = 206414208.

The previous prime is 499725101. The next prime is 499725131. The reversal of 499725128 is 821527994.

It is a hoax number, since the sum of its digits (47) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1391813 + ... + 1392171.

It is an arithmetic number, because the mean of its divisors is an integer number (11773350).

Almost surely, 2^499725128 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 499725128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (565120800).

499725128 is an abundant number, since it is smaller than the sum of its proper divisors (630516472).

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

499725128 is a wasteful number, since it uses less digits than its factorization.

499725128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 499 (or 488 counting only the distinct ones).

The product of its digits is 362880, while the sum is 47.

The square root of 499725128 is about 22354.5326052682. The cubic root of 499725128 is about 793.5550552896. Note that the first 3 decimals are identical.

The spelling of 499725128 in words is "four hundred ninety-nine million, seven hundred twenty-five thousand, one hundred twenty-eight".