1279328140 has 48 divisors (see below), whose sum is σ = 2831109120. Its totient is φ = 484263360.

The previous prime is 1279328137. The next prime is 1279328143. The reversal of 1279328140 is 418239721.

It is an interprime number because it is at equal distance from previous prime (1279328137) and next prime (1279328143).

It is a self number, because there is not a number n which added to its sum of digits gives 1279328140.

It is not an unprimeable number, because it can be changed into a prime (1279328143) 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, 595909 + ... + 598051.

It is an arithmetic number, because the mean of its divisors is an integer number (58981440).

Almost surely, 2^1279328140 is an apocalyptic number.

1279328140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1279328140 is an abundant number, since it is smaller than the sum of its proper divisors (1551780980).

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

1279328140 is a wasteful number, since it uses less digits than its factorization.

1279328140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3742 (or 3740 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 1279328140 is about 35767.6968786082. The cubic root of 1279328140 is about 1085.5770437426.

The spelling of 1279328140 in words is "one billion, two hundred seventy-nine million, three hundred twenty-eight thousand, one hundred forty".