3897918 has 12 divisors (see below), whose sum is σ = 8445528. Its totient is φ = 1299300.

The previous prime is 3897899. The next prime is 3897937. The reversal of 3897918 is 8197983.

It is an interprime number because it is at equal distance from previous prime (3897899) and next prime (3897937).

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 108258 + ... + 108293.

It is an arithmetic number, because the mean of its divisors is an integer number (703794).

Almost surely, 2^3897918 is an apocalyptic number.

3897918 is an abundant number, since it is smaller than the sum of its proper divisors (4547610).

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

3897918 is a wasteful number, since it uses less digits than its factorization.

3897918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216559 (or 216556 counting only the distinct ones).

The product of its digits is 108864, while the sum is 45.

The square root of 3897918 is about 1974.3145646021. The cubic root of 3897918 is about 157.3780764651.

The spelling of 3897918 in words is "three million, eight hundred ninety-seven thousand, nine hundred eighteen".