3969890 has 16 divisors (see below), whose sum is σ = 7233408. Its totient is φ = 1568496.

The previous prime is 3969871. The next prime is 3969899. The reversal of 3969890 is 989693.

3969890 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×3969890² = 31520053224200, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3969899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1562 + ... + 3221.

It is an arithmetic number, because the mean of its divisors is an integer number (452088).

Almost surely, 2^3969890 is an apocalyptic number.

3969890 is a deficient number, since it is larger than the sum of its proper divisors (3263518).

3969890 is a wasteful number, since it uses less digits than its factorization.

3969890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4873.

The product of its (nonzero) digits is 104976, while the sum is 44.

The square root of 3969890 is about 1992.4582806172. The cubic root of 3969890 is about 158.3407962010.

The spelling of 3969890 in words is "three million, nine hundred sixty-nine thousand, eight hundred ninety".