3906890 has 32 divisors (see below), whose sum is σ = 7768656. Its totient is φ = 1405440.

The previous prime is 3906883. The next prime is 3906907. The reversal of 3906890 is 986093.

It can be written as a sum of positive squares in 8 ways, for example, as 1087849 + 2819041 = 1043^2 + 1679^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 3906890.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4964 + ... + 5696.

Almost surely, 2^3906890 is an apocalyptic number.

3906890 is a deficient number, since it is larger than the sum of its proper divisors (3861766).

3906890 is a wasteful number, since it uses less digits than its factorization.

3906890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 794.

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 3906890 is about 1976.5854395902. The cubic root of 3906890 is about 157.4987318282.

The spelling of 3906890 in words is "three million, nine hundred six thousand, eight hundred ninety".