3420040 has 32 divisors (see below), whose sum is σ = 8288280. Its totient is φ = 1262592.

The previous prime is 3420023. The next prime is 3420047. The reversal of 3420040 is 400243.

It can be written as a sum of positive squares in 4 ways, for example, as 3090564 + 329476 = 1758^2 + 574^2 .

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a self number, because there is not a number n which added to its sum of digits gives 3420040.

It is not an unprimeable number, because it can be changed into a prime (3420047) 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, 2769 + ... + 3808.

Almost surely, 2^3420040 is an apocalyptic number.

It is an amenable number.

3420040 is an abundant number, since it is smaller than the sum of its proper divisors (4868240).

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

3420040 is a wasteful number, since it uses less digits than its factorization.

3420040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6601 (or 6597 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 13.

The square root of 3420040 is about 1849.3350156205. The cubic root of 3420040 is about 150.6643128390.

Adding to 3420040 its reverse (400243), we get a palindrome (3820283).

The spelling of 3420040 in words is "three million, four hundred twenty thousand, forty".