3997900 has 18 divisors (see below), whose sum is σ = 8675660. Its totient is φ = 1599120.

The previous prime is 3997897. The next prime is 3997909. The reversal of 3997900 is 97993.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 3997900.

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, 19890 + ... + 20089.

Almost surely, 2^3997900 is an apocalyptic number.

It is an amenable number.

3997900 is an abundant number, since it is smaller than the sum of its proper divisors (4677760).

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

3997900 is a wasteful number, since it uses less digits than its factorization.

3997900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39993 (or 39986 counting only the distinct ones).

The product of its (nonzero) digits is 15309, while the sum is 37.

The square root of 3997900 is about 1999.4749310757. The cubic root of 3997900 is about 158.7123208156.

The spelling of 3997900 in words is "three million, nine hundred ninety-seven thousand, nine hundred".