3821440 has 64 divisors (see below), whose sum is σ = 10452960. Its totient is φ = 1308672.

The previous prime is 3821437. The next prime is 3821483. The reversal of 3821440 is 441283.

It is a tau number, because it is divible by the number of its divisors (64).

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, 4054 + ... + 4906.

Almost surely, 2^3821440 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 3821440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5226480).

3821440 is an abundant number, since it is smaller than the sum of its proper divisors (6631520).

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

3821440 is an equidigital number, since it uses as much as digits as its factorization.

3821440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 879 (or 867 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 3821440 is about 1954.8503779062. The cubic root of 3821440 is about 156.3420066120.

The spelling of 3821440 in words is "three million, eight hundred twenty-one thousand, four hundred forty".