449838621 has 6 divisors (see below), whose sum is σ = 649766910. Its totient is φ = 299892408.

The previous prime is 449838607. The next prime is 449838643. The reversal of 449838621 is 126838944.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 448973721 + 864900 = 21189^2 + 930^2 .

It is not a de Polignac number, because 449838621 - 2⁵ = 449838589 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (449838671) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 24991026 + ... + 24991043.

It is an arithmetic number, because the mean of its divisors is an integer number (108294485).

Almost surely, 2^449838621 is an apocalyptic number.

It is an amenable number.

449838621 is a deficient number, since it is larger than the sum of its proper divisors (199928289).

449838621 is a wasteful number, since it uses less digits than its factorization.

449838621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49982075 (or 49982072 counting only the distinct ones).

The product of its digits is 331776, while the sum is 45.

The square root of 449838621 is about 21209.3993550030. The cubic root of 449838621 is about 766.2178168114.

The spelling of 449838621 in words is "four hundred forty-nine million, eight hundred thirty-eight thousand, six hundred twenty-one".