499209648 has 120 divisors (see below), whose sum is σ = 1579273920. Its totient is φ = 135112320.

The previous prime is 499209643. The next prime is 499209653. The reversal of 499209648 is 846902994.

It is a happy number.

It is a Cunningham number, because it is equal to 22343²-1.

It is an interprime number because it is at equal distance from previous prime (499209643) and next prime (499209653).

It is a self number, because there is not a number n which added to its sum of digits gives 499209648.

It is not an unprimeable number, because it can be changed into a prime (499209643) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 39103 + ... + 50273.

It is an arithmetic number, because the mean of its divisors is an integer number (13160616).

Almost surely, 2^499209648 is an apocalyptic number.

499209648 is a gapful number since it is divisible by the number (48) 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 499209648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (789636960).

499209648 is an abundant number, since it is smaller than the sum of its proper divisors (1080064272).

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

499209648 is a wasteful number, since it uses less digits than its factorization.

499209648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11215 (or 11202 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 51.

The square root of 499209648 is about 22342.9999776216. Note that the first 4 decimals coincide. The cubic root of 499209648 is about 793.2821035739.

The spelling of 499209648 in words is "four hundred ninety-nine million, two hundred nine thousand, six hundred forty-eight".