448493661 has 48 divisors (see below), whose sum is σ = 811519488. Its totient is φ = 231876000.

The previous prime is 448493659. The next prime is 448493681. The reversal of 448493661 is 166394844.

It is not a de Polignac number, because 448493661 - 2¹ = 448493659 is a prime.

It is a super-2 number, since 2×448493661² = 402293127914365842, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (448493611) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 155886 + ... + 158736.

It is an arithmetic number, because the mean of its divisors is an integer number (16906656).

Almost surely, 2^448493661 is an apocalyptic number.

It is an amenable number.

448493661 is a deficient number, since it is larger than the sum of its proper divisors (363025827).

448493661 is a wasteful number, since it uses less digits than its factorization.

448493661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3102 (or 3099 counting only the distinct ones).

The product of its digits is 497664, while the sum is 45.

The square root of 448493661 is about 21177.6689227120. The cubic root of 448493661 is about 765.4534233679.

The spelling of 448493661 in words is "four hundred forty-eight million, four hundred ninety-three thousand, six hundred sixty-one".