1279728 has 30 divisors (see below), whose sum is σ = 3581864. Its totient is φ = 426528.

The previous prime is 1279727. The next prime is 1279753. The reversal of 1279728 is 8279721.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1279692 and 1279701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1279727) 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, 4300 + ... + 4587.

2^1279728 is an apocalyptic number.

1279728 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1279728 is an abundant number, since it is smaller than the sum of its proper divisors (2302136).

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

1279728 is a wasteful number, since it uses less digits than its factorization.

1279728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8901 (or 8892 counting only the distinct ones).

The product of its digits is 14112, while the sum is 36.

The square root of 1279728 is about 1131.2506353589. The cubic root of 1279728 is about 108.5690132690.

The spelling of 1279728 in words is "one million, two hundred seventy-nine thousand, seven hundred twenty-eight".