3997908 has 18 divisors (see below), whose sum is σ = 10105914. Its totient is φ = 1332624.

The previous prime is 3997897. The next prime is 3997909. The reversal of 3997908 is 8097993.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 3755844 + 242064 = 1938^2 + 492^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3997909) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 55491 + ... + 55562.

Almost surely, 2^3997908 is an apocalyptic number.

It is an amenable number.

3997908 is an abundant number, since it is smaller than the sum of its proper divisors (6108006).

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

3997908 is a wasteful number, since it uses less digits than its factorization.

3997908 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111063 (or 111058 counting only the distinct ones).

The product of its (nonzero) digits is 122472, while the sum is 45.

The square root of 3997908 is about 1999.4769315999. The cubic root of 3997908 is about 158.7124266793.

The spelling of 3997908 in words is "three million, nine hundred ninety-seven thousand, nine hundred eight".