3974985694 has 16 divisors (see below), whose sum is σ = 6106345056. Its totient is φ = 1940092000.

The previous prime is 3974985689. The next prime is 3974985709. The reversal of 3974985694 is 4965894793.

It is a super-2 number, since 2×3974985694² = 31601022535009323272, 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 (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 124237 + ... + 152920.

It is an arithmetic number, because the mean of its divisors is an integer number (381646566).

Almost surely, 2^3974985694 is an apocalyptic number.

3974985694 is a deficient number, since it is larger than the sum of its proper divisors (2131359362).

3974985694 is a wasteful number, since it uses less digits than its factorization.

3974985694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277331.

The product of its digits is 58786560, while the sum is 64.

The square root of 3974985694 is about 63047.4876105305. The cubic root of 3974985694 is about 1584.0851522834.

Subtracting 3974985694 from its reverse (4965894793), we obtain a palindrome (990909099).

The spelling of 3974985694 in words is "three billion, nine hundred seventy-four million, nine hundred eighty-five thousand, six hundred ninety-four".