3900020 has 24 divisors (see below), whose sum is σ = 8269800. Its totient is φ = 1544832.

The previous prime is 3899989. The next prime is 3900067. The reversal of 3900020 is 200093.

It is a happy number.

3900020 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 4 ways, for example, as 1607824 + 2292196 = 1268^2 + 1514^2 .

It is a junction number, because it is equal to n+sod(n) for n = 3899968 and 3900004.

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 7 ways as a sum of consecutive naturals, for example, 1286 + ... + 3074.

It is an arithmetic number, because the mean of its divisors is an integer number (344575).

Almost surely, 2^3900020 is an apocalyptic number.

It is an amenable number.

3900020 is an abundant number, since it is smaller than the sum of its proper divisors (4369780).

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

3900020 is a wasteful number, since it uses less digits than its factorization.

3900020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1907 (or 1905 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 14.

The square root of 3900020 is about 1974.8468295035. The cubic root of 3900020 is about 157.4063607329.

The spelling of 3900020 in words is "three million, nine hundred thousand, twenty".