1320634368 has 240 divisors, whose sum is σ = 4162158000. Its totient is φ = 416047104.

The previous prime is 1320634297. The next prime is 1320634391. The reversal of 1320634368 is 8634360231.

1320634368 is a `hidden beast` number, since 13 + 2 + 0 + 634 + 3 + 6 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3151663 + ... + 3152081.

It is an arithmetic number, because the mean of its divisors is an integer number (17342325).

Almost surely, 2^1320634368 is an apocalyptic number.

1320634368 is a gapful number since it is divisible by the number (18) 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 1320634368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2081079000).

1320634368 is an abundant number, since it is smaller than the sum of its proper divisors (2841523632).

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

1320634368 is an equidigital number, since it uses as much as digits as its factorization.

1320634368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 472 (or 443 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 36.

The square root of 1320634368 is about 36340.5334027997. The cubic root of 1320634368 is about 1097.1370088974.

Adding to 1320634368 its reverse (8634360231), we get a palindrome (9954994599).

It can be divided in two parts, 13206 and 34368, that added together give a palindrome (47574).

The spelling of 1320634368 in words is "one billion, three hundred twenty million, six hundred thirty-four thousand, three hundred sixty-eight".