3934840 has 128 divisors (see below), whose sum is σ = 11612160. Its totient is φ = 1165824.

The previous prime is 3934823. The next prime is 3934849. The reversal of 3934840 is 484393.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3934849) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 83697 + ... + 83743.

It is an arithmetic number, because the mean of its divisors is an integer number (90720).

Almost surely, 2^3934840 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3934840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5806080).

3934840 is an abundant number, since it is smaller than the sum of its proper divisors (7677320).

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

3934840 is a wasteful number, since it uses less digits than its factorization.

3934840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101 (or 97 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 3934840 is about 1983.6431130624. The cubic root of 3934840 is about 157.8734231660.

It can be divided in two parts, 3934 and 840, that added together give a palindrome (4774).

The spelling of 3934840 in words is "three million, nine hundred thirty-four thousand, eight hundred forty".