449699688 has 64 divisors (see below), whose sum is σ = 1264636800. Its totient is φ = 149894064.

The previous prime is 449699669. The next prime is 449699689. The reversal of 449699688 is 886996944.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (449699689) 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, 4645 + ... + 30347.

It is an arithmetic number, because the mean of its divisors is an integer number (19759950).

Almost surely, 2^449699688 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 449699688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (632318400).

449699688 is an abundant number, since it is smaller than the sum of its proper divisors (814937112).

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

449699688 is an equidigital number, since it uses as much as digits as its factorization.

449699688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25730 (or 25708 counting only the distinct ones).

The product of its digits is 26873856, while the sum is 63.

The square root of 449699688 is about 21206.1238325159. The cubic root of 449699688 is about 766.1389263707.

The spelling of 449699688 in words is "four hundred forty-nine million, six hundred ninety-nine thousand, six hundred eighty-eight".