1320047456 has 144 divisors (see below), whose sum is σ = 3362325120. Its totient is φ = 505128960.

The previous prime is 1320047453. The next prime is 1320047459. The reversal of 1320047456 is 6547400231.

It is an interprime number because it is at equal distance from previous prime (1320047453) and next prime (1320047459).

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320047453) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 630860 + ... + 632948.

It is an arithmetic number, because the mean of its divisors is an integer number (23349480).

Almost surely, 2^1320047456 is an apocalyptic number.

1320047456 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1320047456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1681162560).

1320047456 is an abundant number, since it is smaller than the sum of its proper divisors (2042277664).

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

1320047456 is a wasteful number, since it uses less digits than its factorization.

1320047456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2157 (or 2142 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 32.

The square root of 1320047456 is about 36332.4573350056. The cubic root of 1320047456 is about 1096.9744561360.

Adding to 1320047456 its reverse (6547400231), we get a palindrome (7867447687).

The spelling of 1320047456 in words is "one billion, three hundred twenty million, forty-seven thousand, four hundred fifty-six".