3957890 has 32 divisors (see below), whose sum is σ = 7715520. Its totient is φ = 1456704.

The previous prime is 3957883. The next prime is 3957907. The reversal of 3957890 is 987593.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a nialpdrome in base 13.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6749 + ... + 7311.

It is an arithmetic number, because the mean of its divisors is an integer number (241110).

Almost surely, 2^3957890 is an apocalyptic number.

3957890 is a deficient number, since it is larger than the sum of its proper divisors (3757630).

3957890 is a wasteful number, since it uses less digits than its factorization.

3957890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 626.

The product of its (nonzero) digits is 68040, while the sum is 41.

The square root of 3957890 is about 1989.4446461261. Note that the first 3 decimals coincide. The cubic root of 3957890 is about 158.1810934320.

The spelling of 3957890 in words is "three million, nine hundred fifty-seven thousand, eight hundred ninety".