3640420 has 24 divisors (see below), whose sum is σ = 8737344. Its totient is φ = 1248096.

The previous prime is 3640409. The next prime is 3640447. The reversal of 3640420 is 240463.

3640420 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12862 + ... + 13141.

It is an arithmetic number, because the mean of its divisors is an integer number (364056).

Almost surely, 2^3640420 is an apocalyptic number.

It is an amenable number.

3640420 is an abundant number, since it is smaller than the sum of its proper divisors (5096924).

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

3640420 is a wasteful number, since it uses less digits than its factorization.

3640420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26019 (or 26017 counting only the distinct ones).

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

The square root of 3640420 is about 1907.9884695668. The cubic root of 3640420 is about 153.8333498318.

Adding to 3640420 its reverse (240463), we get a palindrome (3880883).

The spelling of 3640420 in words is "three million, six hundred forty thousand, four hundred twenty".