449637021 has 16 divisors (see below), whose sum is σ = 667883520. Its totient is φ = 298968480.

The previous prime is 449637017. The next prime is 449637031. The reversal of 449637021 is 120736944.

It is not a de Polignac number, because 449637021 - 2² = 449637017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (449637011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11400 + ... + 32081.

It is an arithmetic number, because the mean of its divisors is an integer number (41742720).

Almost surely, 2^449637021 is an apocalyptic number.

It is an amenable number.

449637021 is a deficient number, since it is larger than the sum of its proper divisors (218246499).

449637021 is a wasteful number, since it uses less digits than its factorization.

449637021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43873 (or 43867 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 449637021 is about 21204.6462125639. The cubic root of 449637021 is about 766.1033367986.

It can be divided in two parts, 44963 and 7021, that added together give a square (51984 = 228²).

The spelling of 449637021 in words is "four hundred forty-nine million, six hundred thirty-seven thousand, twenty-one".