3998140 has 24 divisors (see below), whose sum is σ = 8593200. Its totient is φ = 1561728.

The previous prime is 3998131. The next prime is 3998171. The reversal of 3998140 is 418993.

3998140 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 3998096 and 3998105.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1465 + ... + 3184.

It is an arithmetic number, because the mean of its divisors is an integer number (358050).

Almost surely, 2^3998140 is an apocalyptic number.

It is an amenable number.

3998140 is an abundant number, since it is smaller than the sum of its proper divisors (4595060).

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

3998140 is a wasteful number, since it uses less digits than its factorization.

3998140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4701 (or 4699 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 3998140 is about 1999.5349459312. The cubic root of 3998140 is about 158.7154966658.

The spelling of 3998140 in words is "three million, nine hundred ninety-eight thousand, one hundred forty".