448456781 has 8 divisors (see below), whose sum is σ = 450662520. Its totient is φ = 446257152.

The previous prime is 448456741. The next prime is 448456871. The reversal of 448456781 is 187654844.

It can be written as a sum of positive squares in 4 ways, for example, as 9554281 + 438902500 = 3091^2 + 20950^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 448456781 - 2¹⁴ = 448440397 is a prime.

It is a super-2 number, since 2×448456781² = 402226968849763922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (448456721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 211181 + ... + 213293.

It is an arithmetic number, because the mean of its divisors is an integer number (56332815).

Almost surely, 2^448456781 is an apocalyptic number.

It is an amenable number.

448456781 is a deficient number, since it is larger than the sum of its proper divisors (2205739).

448456781 is a wasteful number, since it uses less digits than its factorization.

448456781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3055.

The product of its digits is 860160, while the sum is 47.

The square root of 448456781 is about 21176.7981763061. The cubic root of 448456781 is about 765.4324415061.

The spelling of 448456781 in words is "four hundred forty-eight million, four hundred fifty-six thousand, seven hundred eighty-one".