3907998 has 12 divisors (see below), whose sum is σ = 8467368. Its totient is φ = 1302660.

The previous prime is 3907991. The next prime is 3908017. The reversal of 3907998 is 8997093.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3907991) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 108538 + ... + 108573.

It is an arithmetic number, because the mean of its divisors is an integer number (705614).

Almost surely, 2^3907998 is an apocalyptic number.

3907998 is an abundant number, since it is smaller than the sum of its proper divisors (4559370).

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

3907998 is a wasteful number, since it uses less digits than its factorization.

3907998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217119 (or 217116 counting only the distinct ones).

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

The square root of 3907998 is about 1976.8657010531. The cubic root of 3907998 is about 157.5136193816.

The spelling of 3907998 in words is "three million, nine hundred seven thousand, nine hundred ninety-eight".