1320438 has 32 divisors (see below), whose sum is σ = 3052800. Its totient is φ = 372960.

The previous prime is 1320437. The next prime is 1320533. The reversal of 1320438 is 8340231.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320433) 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 15 ways as a sum of consecutive naturals, for example, 6153 + ... + 6363.

It is an arithmetic number, because the mean of its divisors is an integer number (95400).

2^1320438 is an apocalyptic number.

1320438 is an abundant number, since it is smaller than the sum of its proper divisors (1732362).

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

1320438 is a wasteful number, since it uses less digits than its factorization.

1320438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 372.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 1320438 is about 1149.1031285311. The cubic root of 1320438 is about 109.7082627638.

Adding to 1320438 its reverse (8340231), we get a palindrome (9660669).

The spelling of 1320438 in words is "one million, three hundred twenty thousand, four hundred thirty-eight".