499949688 has 64 divisors (see below), whose sum is σ = 1437269760. Its totient is φ = 141958656.

The previous prime is 499949687. The next prime is 499949699. The reversal of 499949688 is 886949994.

Its product of digits (40310784) is a multiple of the sum of its prime divisors (18432).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (499949687) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18256 + ... + 36512.

It is an arithmetic number, because the mean of its divisors is an integer number (22457340).

Almost surely, 2^499949688 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 499949688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (718634880).

499949688 is an abundant number, since it is smaller than the sum of its proper divisors (937320072).

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

499949688 is a wasteful number, since it uses less digits than its factorization.

499949688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18436 (or 18432 counting only the distinct ones).

The product of its digits is 40310784, while the sum is 66.

The square root of 499949688 is about 22359.5547361749. The cubic root of 499949688 is about 793.6739033172.

The spelling of 499949688 in words is "four hundred ninety-nine million, nine hundred forty-nine thousand, six hundred eighty-eight".