3138461685 has 24 divisors (see below), whose sum is σ = 5442255000. Its totient is φ = 1673152512.

The previous prime is 3138461663. The next prime is 3138461687. The reversal of 3138461685 is 5861648313.

It can be written as a sum of positive squares in 4 ways, for example, as 835325604 + 2303136081 = 28902^2 + 47991^2 .

It is not a de Polignac number, because 3138461685 - 2¹² = 3138457589 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 3138461685.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3138461687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 106441 + ... + 132689.

It is an arithmetic number, because the mean of its divisors is an integer number (226760625).

Almost surely, 2^3138461685 is an apocalyptic number.

It is an amenable number.

3138461685 is a deficient number, since it is larger than the sum of its proper divisors (2303793315).

3138461685 is a wasteful number, since it uses less digits than its factorization.

3138461685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28917 (or 28914 counting only the distinct ones).

The product of its digits is 414720, while the sum is 45.

The square root of 3138461685 is about 56021.9750187371. The cubic root of 3138461685 is about 1464.1051795010.

The spelling of 3138461685 in words is "three billion, one hundred thirty-eight million, four hundred sixty-one thousand, six hundred eighty-five".