3423440 has 20 divisors (see below), whose sum is σ = 7959684. Its totient is φ = 1369344.

The previous prime is 3423419. The next prime is 3423457. The reversal of 3423440 is 443243.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1507984 + 1915456 = 1228^2 + 1384^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21317 + ... + 21476.

Almost surely, 2^3423440 is an apocalyptic number.

It is an amenable number.

3423440 is an abundant number, since it is smaller than the sum of its proper divisors (4536244).

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

3423440 is a wasteful number, since it uses less digits than its factorization.

3423440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42806 (or 42800 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 20.

The square root of 3423440 is about 1850.2540366123. The cubic root of 3423440 is about 150.7142234643.

Adding to 3423440 its reverse (443243), we get a palindrome (3866683).

The spelling of 3423440 in words is "three million, four hundred twenty-three thousand, four hundred forty".