3940398 has 48 divisors (see below), whose sum is σ = 10647936. Its totient is φ = 1023120.

The previous prime is 3940397. The next prime is 3940411. The reversal of 3940398 is 8930493.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3940397) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36 + ... + 2807.

It is an arithmetic number, because the mean of its divisors is an integer number (221832).

Almost surely, 2^3940398 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3940398, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5323968).

3940398 is an abundant number, since it is smaller than the sum of its proper divisors (6707538).

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

3940398 is a wasteful number, since it uses less digits than its factorization.

3940398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2869 (or 2866 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 3940398 is about 1985.0435763479. The cubic root of 3940398 is about 157.9477207799.

The spelling of 3940398 in words is "three million, nine hundred forty thousand, three hundred ninety-eight".