3421620 has 36 divisors (see below), whose sum is σ = 10379460. Its totient is φ = 912384.

The previous prime is 3421603. The next prime is 3421631. The reversal of 3421620 is 261243.

It is a happy number.

3421620 is a `hidden beast` number, since 3 + 42 + 1 + 620 = 666.

3421620 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 2108304 + 1313316 = 1452^2 + 1146^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 3421593 and 3421602.

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 9325 + ... + 9684.

Almost surely, 2^3421620 is an apocalyptic number.

3421620 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3421620 is an abundant number, since it is smaller than the sum of its proper divisors (6957840).

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

3421620 is a wasteful number, since it uses less digits than its factorization.

3421620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19024 (or 19019 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 3421620 is about 1849.7621468719. The cubic root of 3421620 is about 150.6875107125.

Adding to 3421620 its reverse (261243), we get a palindrome (3682863).

The spelling of 3421620 in words is "three million, four hundred twenty-one thousand, six hundred twenty".