3894616685 has 4 divisors (see below), whose sum is σ = 4673540028. Its totient is φ = 3115693344.

The previous prime is 3894616681. The next prime is 3894616699. The reversal of 3894616685 is 5866164983.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 814588681 + 3080028004 = 28541^2 + 55498^2 .

It is a cyclic number.

It is not a de Polignac number, because 3894616685 - 2² = 3894616681 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3894616685.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3894616681) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 389461664 + ... + 389461673.

It is an arithmetic number, because the mean of its divisors is an integer number (1168385007).

Almost surely, 2^3894616685 is an apocalyptic number.

It is an amenable number.

3894616685 is a deficient number, since it is larger than the sum of its proper divisors (778923343).

3894616685 is an equidigital number, since it uses as much as digits as its factorization.

3894616685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 778923342.

The product of its digits is 7464960, while the sum is 56.

The square root of 3894616685 is about 62406.8640856116. The cubic root of 3894616685 is about 1573.3363382063.

The spelling of 3894616685 in words is "three billion, eight hundred ninety-four million, six hundred sixteen thousand, six hundred eighty-five".