3809920 has 32 divisors (see below), whose sum is σ = 9109620. Its totient is φ = 1523712.

The previous prime is 3809917. The next prime is 3809941. The reversal of 3809920 is 299083.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 3182656 + 627264 = 1784^2 + 792^2 .

It is a tau number, because it is divible by the number of its divisors (32).

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 3 ways as a sum of consecutive naturals, for example, 2337 + ... + 3616.

Almost surely, 2^3809920 is an apocalyptic number.

It is an amenable number.

3809920 is an abundant number, since it is smaller than the sum of its proper divisors (5299700).

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

3809920 is an equidigital number, since it uses as much as digits as its factorization.

3809920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5972 (or 5960 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 3809920 is about 1951.9016368660. The cubic root of 3809920 is about 156.1847471530.

The spelling of 3809920 in words is "three million, eight hundred nine thousand, nine hundred twenty".