1280004318 has 12 divisors (see below), whose sum is σ = 2773342728. Its totient is φ = 426668100.

The previous prime is 1280004311. The next prime is 1280004343. The reversal of 1280004318 is 8134000821.

It is a super-2 number, since 2×1280004318² = 3276822108197290248, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1280004291 and 1280004300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1280004311) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 35555658 + ... + 35555693.

It is an arithmetic number, because the mean of its divisors is an integer number (231111894).

Almost surely, 2^1280004318 is an apocalyptic number.

1280004318 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1280004318 is an abundant number, since it is smaller than the sum of its proper divisors (1493338410).

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

1280004318 is a wasteful number, since it uses less digits than its factorization.

1280004318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71111359 (or 71111356 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The square root of 1280004318 is about 35777.1479858303. The cubic root of 1280004318 is about 1085.7682675590.

The spelling of 1280004318 in words is "one billion, two hundred eighty million, four thousand, three hundred eighteen".