1280898978 has 8 divisors (see below), whose sum is σ = 2561797968. Its totient is φ = 426966324.

The previous prime is 1280898961. The next prime is 1280898979. The reversal of 1280898978 is 8798980821.

1280898978 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

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

1280898978 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (1280898979) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106741576 + ... + 106741587.

It is an arithmetic number, because the mean of its divisors is an integer number (320224746).

Almost surely, 2^1280898978 is an apocalyptic number.

1280898978 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1280898978 is a wasteful number, since it uses less digits than its factorization.

1280898978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213483168.

The product of its (nonzero) digits is 4644864, while the sum is 60.

The square root of 1280898978 is about 35789.6490343228. The cubic root of 1280898978 is about 1086.0211748328.

The spelling of 1280898978 in words is "one billion, two hundred eighty million, eight hundred ninety-eight thousand, nine hundred seventy-eight".