3897906 has 8 divisors (see below), whose sum is σ = 7795824. Its totient is φ = 1299300.

The previous prime is 3897899. The next prime is 3897937. The reversal of 3897906 is 6097983.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

3897906 is an admirable number.

It is an Ulam number.

It is a Curzon 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 3 ways as a sum of consecutive naturals, for example, 324820 + ... + 324831.

It is an arithmetic number, because the mean of its divisors is an integer number (974478).

Almost surely, 2^3897906 is an apocalyptic number.

3897906 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

3897906 is a wasteful number, since it uses less digits than its factorization.

3897906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 649656.

The product of its (nonzero) digits is 81648, while the sum is 42.

The square root of 3897906 is about 1974.3115255704. The cubic root of 3897906 is about 157.3779149653.

The spelling of 3897906 in words is "three million, eight hundred ninety-seven thousand, nine hundred six".