1320440 has 32 divisors (see below), whose sum is σ = 3242160. Its totient is φ = 480000.

The previous prime is 1320437. The next prime is 1320533. The reversal of 1320440 is 440231.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1061 + ... + 1940.

2^1320440 is an apocalyptic number.

1320440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1320440 is an abundant number, since it is smaller than the sum of its proper divisors (1921720).

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

1320440 is a wasteful number, since it uses less digits than its factorization.

1320440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3023 (or 3019 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 1320440 is about 1149.1039987747. The cubic root of 1320440 is about 109.7083181536.

Adding to 1320440 its reverse (440231), we get a palindrome (1760671).

The spelling of 1320440 in words is "one million, three hundred twenty thousand, four hundred forty".