3901940 has 48 divisors (see below), whose sum is σ = 9580032. Its totient is φ = 1307136.

The previous prime is 3901907. The next prime is 3901943. The reversal of 3901940 is 491093.

3901940 = T₁₂₆ + T₁₂₇ + ... + T₂₉₃.

It is a happy number.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3901943) 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 15 ways as a sum of consecutive naturals, for example, 6284 + ... + 6876.

It is an arithmetic number, because the mean of its divisors is an integer number (199584).

Almost surely, 2^3901940 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 3901940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4790016).

3901940 is an abundant number, since it is smaller than the sum of its proper divisors (5678092).

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

3901940 is a wasteful number, since it uses less digits than its factorization.

3901940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 656 (or 654 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 3901940 is about 1975.3328833389. The cubic root of 3901940 is about 157.4321871502.

The spelling of 3901940 in words is "three million, nine hundred one thousand, nine hundred forty".