3966890 has 16 divisors (see below), whose sum is σ = 7184808. Its totient is φ = 1576896.

The previous prime is 3966889. The next prime is 3966913. The reversal of 3966890 is 986693.

It can be written as a sum of positive squares in 4 ways, for example, as 3545689 + 421201 = 1883^2 + 649^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 584 + ... + 2876.

Almost surely, 2^3966890 is an apocalyptic number.

3966890 is a deficient number, since it is larger than the sum of its proper divisors (3217918).

3966890 is a wasteful number, since it uses less digits than its factorization.

3966890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2473.

The product of its (nonzero) digits is 69984, while the sum is 41.

The square root of 3966890 is about 1991.7052994858. The cubic root of 3966890 is about 158.3009007131.

The spelling of 3966890 in words is "three million, nine hundred sixty-six thousand, eight hundred ninety".