3840020 has 24 divisors (see below), whose sum is σ = 8148168. Its totient is φ = 1520000.

The previous prime is 3840017. The next prime is 3840037. The reversal of 3840020 is 200483.

3840020 = 116² + 117² + ... + 235².

It can be written as a sum of positive squares in 4 ways, for example, as 498436 + 3341584 = 706^2 + 1828^2 .

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, 1070 + ... + 2970.

It is an arithmetic number, because the mean of its divisors is an integer number (339507).

Almost surely, 2^3840020 is an apocalyptic number.

It is an amenable number.

3840020 is an abundant number, since it is smaller than the sum of its proper divisors (4308148).

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

3840020 is a wasteful number, since it uses less digits than its factorization.

3840020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2011 (or 2009 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 3840020 is about 1959.5968973235. The cubic root of 3840020 is about 156.5949775121.

The spelling of 3840020 in words is "three million, eight hundred forty thousand, twenty".