1280878583 has 16 divisors (see below), whose sum is σ = 1406808000. Its totient is φ = 1160796672.

The previous prime is 1280878561. The next prime is 1280878591. The reversal of 1280878583 is 3858780821.

It is a cyclic number.

It is not a de Polignac number, because 1280878583 - 2¹² = 1280874487 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1280878523) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 188438 + ... + 195116.

It is an arithmetic number, because the mean of its divisors is an integer number (87925500).

Almost surely, 2^1280878583 is an apocalyptic number.

1280878583 is a deficient number, since it is larger than the sum of its proper divisors (125929417).

1280878583 is a wasteful number, since it uses less digits than its factorization.

1280878583 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7114.

The product of its (nonzero) digits is 860160, while the sum is 50.

The square root of 1280878583 is about 35789.3641044375. The cubic root of 1280878583 is about 1086.0154107770.

The spelling of 1280878583 in words is "one billion, two hundred eighty million, eight hundred seventy-eight thousand, five hundred eighty-three".