3938240 has 56 divisors (see below), whose sum is σ = 9704832. Its totient is φ = 1520640.

The previous prime is 3938197. The next prime is 3938251. The reversal of 3938240 is 428393.

It is a zygodrome in base 4.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9722 + ... + 10118.

Almost surely, 2^3938240 is an apocalyptic number.

It is a pronic number, being equal to 1984×1985.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3938240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4852416).

3938240 is an abundant number, since it is smaller than the sum of its proper divisors (5766592).

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

3938240 is a wasteful number, since it uses less digits than its factorization.

3938240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 445 (or 435 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 3938240 is about 1984.4999370118. The cubic root of 3938240 is about 157.9188816098.

The spelling of 3938240 in words is "three million, nine hundred thirty-eight thousand, two hundred forty".