3121187380 has 48 divisors (see below), whose sum is σ = 6904296000. Its totient is φ = 1181938176.

The previous prime is 3121187371. The next prime is 3121187393. The reversal of 3121187380 is 837811213.

It is a super-2 number, since 2×3121187380² = 19483621322142528800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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, 1008876 + ... + 1011964.

It is an arithmetic number, because the mean of its divisors is an integer number (143839500).

Almost surely, 2^3121187380 is an apocalyptic number.

It is an amenable number.

3121187380 is an abundant number, since it is smaller than the sum of its proper divisors (3783108620).

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

3121187380 is a wasteful number, since it uses less digits than its factorization.

3121187380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5776 (or 5774 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 34.

The square root of 3121187380 is about 55867.5879200096. The cubic root of 3121187380 is about 1461.4140581563.

Adding to 3121187380 its reverse (837811213), we get a palindrome (3958998593).

The spelling of 3121187380 in words is "three billion, one hundred twenty-one million, one hundred eighty-seven thousand, three hundred eighty".