1428823 has 4 divisors (see below), whose sum is σ = 1558728. Its totient is φ = 1298920.

The previous prime is 1428811. The next prime is 1428839. The reversal of 1428823 is 3288241.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1428823 - 2¹³ = 1420631 is a prime.

It is a super-3 number, since 3×1428823³ = 8750977198592633301, which contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1428791 and 1428800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1428853) 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 3 ways as a sum of consecutive naturals, for example, 64936 + ... + 64957.

It is an arithmetic number, because the mean of its divisors is an integer number (389682).

2^1428823 is an apocalyptic number.

1428823 is a deficient number, since it is larger than the sum of its proper divisors (129905).

1428823 is a wasteful number, since it uses less digits than its factorization.

1428823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129904.

The product of its digits is 3072, while the sum is 28.

The square root of 1428823 is about 1195.3338445807. Note that the first 3 decimals coincide. The cubic root of 1428823 is about 112.6313987314.

It can be divided in two parts, 1 and 428823, that added together give a palindrome (428824).

The spelling of 1428823 in words is "one million, four hundred twenty-eight thousand, eight hundred twenty-three".