3121326378 has 24 divisors (see below), whose sum is σ = 7160690628. Its totient is φ = 979239552.

The previous prime is 3121326349. The next prime is 3121326379. The reversal of 3121326378 is 8736231213.

3121326378 is a `hidden beast` number, since 3 + 1 + 2 + 13 + 2 + 637 + 8 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 3059970489 + 61355889 = 55317^2 + 7833^2 .

It is not an unprimeable number, because it can be changed into a prime (3121326379) 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, 5099901 + ... + 5100512.

Almost surely, 2^3121326378 is an apocalyptic number.

3121326378 is an abundant number, since it is smaller than the sum of its proper divisors (4039364250).

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

3121326378 is a wasteful number, since it uses less digits than its factorization.

3121326378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10200438 (or 10200435 counting only the distinct ones).

The product of its digits is 36288, while the sum is 36.

The square root of 3121326378 is about 55868.8319011593. The cubic root of 3121326378 is about 1461.4357518891.

The spelling of 3121326378 in words is "three billion, one hundred twenty-one million, three hundred twenty-six thousand, three hundred seventy-eight".