1279928 has 32 divisors (see below), whose sum is σ = 2674560. Its totient is φ = 570240.

The previous prime is 1279921. The next prime is 1279931. The reversal of 1279928 is 8299721.

It is a junction number, because it is equal to n+sod(n) for n = 1279891 and 1279900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1279921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3026 + ... + 3422.

It is an arithmetic number, because the mean of its divisors is an integer number (83580).

2^1279928 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1279928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1337280).

1279928 is an abundant number, since it is smaller than the sum of its proper divisors (1394632).

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

1279928 is a wasteful number, since it uses less digits than its factorization.

1279928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 447 (or 443 counting only the distinct ones).

The product of its digits is 18144, while the sum is 38.

The square root of 1279928 is about 1131.3390296458. The cubic root of 1279928 is about 108.5746688124.

The spelling of 1279928 in words is "one million, two hundred seventy-nine thousand, nine hundred twenty-eight".