1320634620 has 36 divisors (see below), whose sum is σ = 4005925560. Its totient is φ = 352169184.

The previous prime is 1320634607. The next prime is 1320634621. The reversal of 1320634620 is 264360231.

1320634620 is a `hidden beast` number, since 1 + 3 + 2 + 0 + 6 + 34 + 620 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320634621) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3668250 + ... + 3668609.

It is an arithmetic number, because the mean of its divisors is an integer number (111275710).

Almost surely, 2^1320634620 is an apocalyptic number.

1320634620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1320634620 is an abundant number, since it is smaller than the sum of its proper divisors (2685290940).

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

1320634620 is a wasteful number, since it uses less digits than its factorization.

1320634620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7336874 (or 7336869 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

The square root of 1320634620 is about 36340.5368700023. The cubic root of 1320634620 is about 1097.1370786817.

Adding to 1320634620 its reverse (264360231), we get a palindrome (1584994851).

The spelling of 1320634620 in words is "one billion, three hundred twenty million, six hundred thirty-four thousand, six hundred twenty".