1278591008 has 48 divisors (see below), whose sum is σ = 2581092864. Its totient is φ = 623185920.

The previous prime is 1278591007. The next prime is 1278591011. The reversal of 1278591008 is 8001958721.

It is not an unprimeable number, because it can be changed into a prime (1278591007) 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, 406016 + ... + 409152.

It is an arithmetic number, because the mean of its divisors is an integer number (53772768).

Almost surely, 2^1278591008 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1278591008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1290546432).

1278591008 is an abundant number, since it is smaller than the sum of its proper divisors (1302501856).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1278591008 is a wasteful number, since it uses less digits than its factorization.

1278591008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3465 (or 3457 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 41.

The square root of 1278591008 is about 35757.3909562764. The cubic root of 1278591008 is about 1085.3685052938.

The spelling of 1278591008 in words is "one billion, two hundred seventy-eight million, five hundred ninety-one thousand, eight".