1281282448 has 40 divisors (see below), whose sum is σ = 2515687200. Its totient is φ = 632104704.

The previous prime is 1281282427. The next prime is 1281282449. The reversal of 1281282448 is 8442821821.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1281282448.

It is not an unprimeable number, because it can be changed into a prime (1281282449) 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, 1256883 + ... + 1257901.

It is an arithmetic number, because the mean of its divisors is an integer number (62892180).

Almost surely, 2^1281282448 is an apocalyptic number.

It is an amenable number.

1281282448 is a deficient number, since it is larger than the sum of its proper divisors (1234404752).

1281282448 is a wasteful number, since it uses less digits than its factorization.

1281282448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1999 (or 1993 counting only the distinct ones).

The product of its digits is 65536, while the sum is 40.

The square root of 1281282448 is about 35795.0059086460. The cubic root of 1281282448 is about 1086.1295401280.

The spelling of 1281282448 in words is "one billion, two hundred eighty-one million, two hundred eighty-two thousand, four hundred forty-eight".