3486639685 has 16 divisors (see below), whose sum is σ = 4339616112. Its totient is φ = 2687040000.

The previous prime is 3486639677. The next prime is 3486639697. The reversal of 3486639685 is 5869366843.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 1132255201 + 2354384484 = 33649^2 + 48522^2 .

It is not a de Polignac number, because 3486639685 - 2³ = 3486639677 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74616 + ... + 111985.

It is an arithmetic number, because the mean of its divisors is an integer number (271226007).

Almost surely, 2^3486639685 is an apocalyptic number.

It is an amenable number.

3486639685 is a deficient number, since it is larger than the sum of its proper divisors (852976427).

3486639685 is a wasteful number, since it uses less digits than its factorization.

3486639685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186744.

The product of its digits is 22394880, while the sum is 58.

The square root of 3486639685 is about 59047.7745982014. The cubic root of 3486639685 is about 1516.3601280149.

The spelling of 3486639685 in words is "three billion, four hundred eighty-six million, six hundred thirty-nine thousand, six hundred eighty-five".