1278744798 has 16 divisors (see below), whose sum is σ = 2559303936. Its totient is φ = 425945880.

The previous prime is 1278744773. The next prime is 1278744829. The reversal of 1278744798 is 8974478721.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66348 + ... + 83423.

It is an arithmetic number, because the mean of its divisors is an integer number (159956496).

Almost surely, 2^1278744798 is an apocalyptic number.

1278744798 is an abundant number, since it is smaller than the sum of its proper divisors (1280559138).

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

1278744798 is a wasteful number, since it uses less digits than its factorization.

1278744798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151199.

The product of its digits is 6322176, while the sum is 57.

The square root of 1278744798 is about 35759.5413561192. The cubic root of 1278744798 is about 1085.4120198942.

The spelling of 1278744798 in words is "one billion, two hundred seventy-eight million, seven hundred forty-four thousand, seven hundred ninety-eight".