1320444420 has 24 divisors (see below), whose sum is σ = 3697244544. Its totient is φ = 352118496.

The previous prime is 1320444403. The next prime is 1320444431. The reversal of 1320444420 is 244440231.

It is a happy 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, 11003644 + ... + 11003763.

It is an arithmetic number, because the mean of its divisors is an integer number (154051856).

Almost surely, 2^1320444420 is an apocalyptic number.

1320444420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1320444420 is an abundant number, since it is smaller than the sum of its proper divisors (2376800124).

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

1320444420 is a wasteful number, since it uses less digits than its factorization.

1320444420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22007419 (or 22007417 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 24.

The square root of 1320444420 is about 36337.9198634154. The cubic root of 1320444420 is about 1097.0844056491.

Adding to 1320444420 its reverse (244440231), we get a palindrome (1564884651).

The spelling of 1320444420 in words is "one billion, three hundred twenty million, four hundred forty-four thousand, four hundred twenty".