3940995906 has 24 divisors (see below), whose sum is σ = 8539990524. Its totient is φ = 1313485920.

The previous prime is 3940995899. The next prime is 3940995943. The reversal of 3940995906 is 6095990493.

3940995906 is a `hidden beast` number, since 3 + 9 + 40 + 9 + 9 + 590 + 6 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 3580945281 + 360050625 = 59841^2 + 18975^2 .

It is a super-2 number, since 2×3940995906² = 31062897462217521672, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 222240 + ... + 239316.

Almost surely, 2^3940995906 is an apocalyptic number.

3940995906 is an abundant number, since it is smaller than the sum of its proper divisors (4598994618).

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

3940995906 is a wasteful number, since it uses less digits than its factorization.

3940995906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29906 (or 29903 counting only the distinct ones).

The product of its (nonzero) digits is 2361960, while the sum is 54.

The square root of 3940995906 is about 62777.3518555856. The cubic root of 3940995906 is about 1579.5570923803.

The spelling of 3940995906 in words is "three billion, nine hundred forty million, nine hundred ninety-five thousand, nine hundred six".