1428438 has 32 divisors (see below), whose sum is σ = 3255552. Its totient is φ = 413600.

The previous prime is 1428431. The next prime is 1428473. The reversal of 1428438 is 8348241.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1428431) 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 15 ways as a sum of consecutive naturals, for example, 1048 + ... + 1988.

It is an arithmetic number, because the mean of its divisors is an integer number (101736).

2^1428438 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1428438, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1627776).

1428438 is an abundant number, since it is smaller than the sum of its proper divisors (1827114).

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

1428438 is a wasteful number, since it uses less digits than its factorization.

1428438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 980.

The product of its digits is 6144, while the sum is 30.

The square root of 1428438 is about 1195.1727908549. The cubic root of 1428438 is about 112.6212815501.

The spelling of 1428438 in words is "one million, four hundred twenty-eight thousand, four hundred thirty-eight".