1279320948 has 18 divisors (see below), whose sum is σ = 3233839154. Its totient is φ = 426440304.

The previous prime is 1279320947. The next prime is 1279320949. The reversal of 1279320948 is 8490239721.

It is an interprime number because it is at equal distance from previous prime (1279320947) and next prime (1279320949).

It can be written as a sum of positive squares in only one way, i.e., 1120107024 + 159213924 = 33468^2 + 12618^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1279320947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17768311 + ... + 17768382.

Almost surely, 2^1279320948 is an apocalyptic number.

1279320948 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1279320948 is an abundant number, since it is smaller than the sum of its proper divisors (1954518206).

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

1279320948 is a wasteful number, since it uses less digits than its factorization.

1279320948 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35536703 (or 35536698 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The square root of 1279320948 is about 35767.5963408222. The cubic root of 1279320948 is about 1085.5750094757.

The spelling of 1279320948 in words is "one billion, two hundred seventy-nine million, three hundred twenty thousand, nine hundred forty-eight".