1428884 has 12 divisors (see below), whose sum is σ = 2647764. Its totient is φ = 672384.

The previous prime is 1428863. The next prime is 1428887. The reversal of 1428884 is 4888241.

It can be written as a sum of positive squares in 2 ways, for example, as 384400 + 1044484 = 620^2 + 1022^2 .

It is a super-3 number, since 3×1428884³ = 8752098049248933312, which contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1428887) 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 3 ways as a sum of consecutive naturals, for example, 10439 + ... + 10574.

It is an arithmetic number, because the mean of its divisors is an integer number (220647).

2^1428884 is an apocalyptic number.

It is an amenable number.

1428884 is a deficient number, since it is larger than the sum of its proper divisors (1218880).

1428884 is a wasteful number, since it uses less digits than its factorization.

1428884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21034 (or 21032 counting only the distinct ones).

The product of its digits is 16384, while the sum is 35.

The square root of 1428884 is about 1195.3593601926. The cubic root of 1428884 is about 112.6330015466.

The spelling of 1428884 in words is "one million, four hundred twenty-eight thousand, eight hundred eighty-four".