3431440 has 40 divisors (see below), whose sum is σ = 8124480. Its totient is φ = 1347456.

The previous prime is 3431437. The next prime is 3431447. The reversal of 3431440 is 441343.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (3431447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4357 + ... + 5083.

It is an arithmetic number, because the mean of its divisors is an integer number (203112).

Almost surely, 2^3431440 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 3431440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4062240).

3431440 is an abundant number, since it is smaller than the sum of its proper divisors (4693040).

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

3431440 is a wasteful number, since it uses less digits than its factorization.

3431440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 799 (or 793 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 3431440 is about 1852.4146404086. The cubic root of 3431440 is about 150.8315300158.

Adding to 3431440 its reverse (441343), we get a palindrome (3872783).

The spelling of 3431440 in words is "three million, four hundred thirty-one thousand, four hundred forty".