3901840 has 80 divisors (see below), whose sum is σ = 10177920. Its totient is φ = 1382400.

The previous prime is 3901837. The next prime is 3901841. The reversal of 3901840 is 481093.

It is a tau number, because it is divible by the number of its divisors (80).

It is a plaindrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (3901841) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25765 + ... + 25915.

It is an arithmetic number, because the mean of its divisors is an integer number (127224).

Almost surely, 2^3901840 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 3901840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5088960).

3901840 is an abundant number, since it is smaller than the sum of its proper divisors (6276080).

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

3901840 is a wasteful number, since it uses less digits than its factorization.

3901840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200 (or 194 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 3901840 is about 1975.3075709874. The cubic root of 3901840 is about 157.4308422334.

The spelling of 3901840 in words is "three million, nine hundred one thousand, eight hundred forty".