3648220 has 24 divisors (see below), whose sum is σ = 7761600. Its totient is φ = 1440192.

The previous prime is 3648179. The next prime is 3648241. The reversal of 3648220 is 228463.

3648220 = T₁₃₁ + T₁₃₂ + ... + T₂₈₈.

It is a happy number.

3648220 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 426 + ... + 2734.

It is an arithmetic number, because the mean of its divisors is an integer number (323400).

Almost surely, 2^3648220 is an apocalyptic number.

It is an amenable number.

3648220 is an abundant number, since it is smaller than the sum of its proper divisors (4113380).

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

3648220 is a wasteful number, since it uses less digits than its factorization.

3648220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2397 (or 2395 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 3648220 is about 1910.0314133542. The cubic root of 3648220 is about 153.9431397439.

The spelling of 3648220 in words is "three million, six hundred forty-eight thousand, two hundred twenty".