3121432660 has 48 divisors (see below), whose sum is σ = 6616157184. Its totient is φ = 1236964608.

The previous prime is 3121432627. The next prime is 3121432663. The reversal of 3121432660 is 662341213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3121432663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1991197 + ... + 1992763.

It is an arithmetic number, because the mean of its divisors is an integer number (137836608).

Almost surely, 2^3121432660 is an apocalyptic number.

It is an amenable number.

3121432660 is an abundant number, since it is smaller than the sum of its proper divisors (3494724524).

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

3121432660 is a wasteful number, since it uses less digits than its factorization.

3121432660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2440 (or 2438 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 3121432660 is about 55869.7830674149. The cubic root of 3121432660 is about 1461.4523391273.

Adding to 3121432660 its reverse (662341213), we get a palindrome (3783773873).

The spelling of 3121432660 in words is "three billion, one hundred twenty-one million, four hundred thirty-two thousand, six hundred sixty".