3453440 has 80 divisors (see below), whose sum is σ = 8838720. Its totient is φ = 1290240.

The previous prime is 3453409. The next prime is 3453451. The reversal of 3453440 is 443543.

It is a happy number.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48605 + ... + 48675.

It is an arithmetic number, because the mean of its divisors is an integer number (110484).

Almost surely, 2^3453440 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 3453440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4419360).

3453440 is an abundant number, since it is smaller than the sum of its proper divisors (5385280).

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

3453440 is an equidigital number, since it uses as much as digits as its factorization.

3453440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113 (or 97 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 23.

The square root of 3453440 is about 1858.3433482540. The cubic root of 3453440 is about 151.1531857720.

Adding to 3453440 its reverse (443543), we get a palindrome (3896983).

The spelling of 3453440 in words is "three million, four hundred fifty-three thousand, four hundred forty".