1028438 has 4 divisors (see below), whose sum is σ = 1542660. Its totient is φ = 514218.

The previous prime is 1028437. The next prime is 1028471. The reversal of 1028438 is 8348201.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1028437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 257108 + ... + 257111.

It is an arithmetic number, because the mean of its divisors is an integer number (385665).

2^1028438 is an apocalyptic number.

1028438 is a deficient number, since it is larger than the sum of its proper divisors (514222).

1028438 is an equidigital number, since it uses as much as digits as its factorization.

1028438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 514221.

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 1028438 is about 1014.1193223679. The cubic root of 1028438 is about 100.9390868860.

The spelling of 1028438 in words is "one million, twenty-eight thousand, four hundred thirty-eight".