3420240 has 40 divisors (see below), whose sum is σ = 10603488. Its totient is φ = 912000.

The previous prime is 3420239. The next prime is 3420251. The reversal of 3420240 is 420243.

It is a happy number.

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

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

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, 6886 + ... + 7365.

Almost surely, 2^3420240 is an apocalyptic number.

3420240 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3420240 is an abundant number, since it is smaller than the sum of its proper divisors (7183248).

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

3420240 is a wasteful number, since it uses less digits than its factorization.

3420240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14267 (or 14261 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 15.

The square root of 3420240 is about 1849.3890883208. The cubic root of 3420240 is about 150.6672496736.

Adding to 3420240 its reverse (420243), we get a palindrome (3840483).

The spelling of 3420240 in words is "three million, four hundred twenty thousand, two hundred forty".