1320005632 has 52 divisors (see below), whose sum is σ = 2879759016. Its totient is φ = 599982080.

The previous prime is 1320005611. The next prime is 1320005633. The reversal of 1320005632 is 2365000231.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (1320005633) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30408 + ... + 59704.

Almost surely, 2^1320005632 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1320005632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1439879508).

1320005632 is an abundant number, since it is smaller than the sum of its proper divisors (1559753384).

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

1320005632 is an equidigital number, since it uses as much as digits as its factorization.

1320005632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29332 (or 29310 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 1320005632 is about 36331.8817569363. The cubic root of 1320005632 is about 1096.9628706071.

Adding to 1320005632 its reverse (2365000231), we get a palindrome (3685005863).

The spelling of 1320005632 in words is "one billion, three hundred twenty million, five thousand, six hundred thirty-two".