1428726 has 24 divisors (see below), whose sum is σ = 3096360. Its totient is φ = 439296.

The previous prime is 1428709. The next prime is 1428751. The reversal of 1428726 is 6278241.

It is a d-powerful number, because it can be written as 1 + 4⁴ + 2¹⁸ + 8² + 7⁶ + 2²⁰ + 6² .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1428693 and 1428702.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 310 + ... + 1718.

It is an arithmetic number, because the mean of its divisors is an integer number (129015).

2^1428726 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1428726, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1548180).

1428726 is an abundant number, since it is smaller than the sum of its proper divisors (1667634).

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

1428726 is a wasteful number, since it uses less digits than its factorization.

1428726 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1440 (or 1427 counting only the distinct ones).

The product of its digits is 5376, while the sum is 30.

The square root of 1428726 is about 1195.2932694531. The cubic root of 1428726 is about 112.6288498986.

The spelling of 1428726 in words is "one million, four hundred twenty-eight thousand, seven hundred twenty-six".