3840040 has 16 divisors (see below), whose sum is σ = 8640180. Its totient is φ = 1536000.

The previous prime is 3840037. The next prime is 3840043. The reversal of 3840040 is 400483.

It is an interprime number because it is at equal distance from previous prime (3840037) and next prime (3840043).

It can be written as a sum of positive squares in 2 ways, for example, as 3541924 + 298116 = 1882^2 + 546^2 .

It is not an unprimeable number, because it can be changed into a prime (3840043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47961 + ... + 48040.

Almost surely, 2^3840040 is an apocalyptic number.

It is an amenable number.

3840040 is an abundant number, since it is smaller than the sum of its proper divisors (4800140).

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

3840040 is a wasteful number, since it uses less digits than its factorization.

3840040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96012 (or 96008 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 3840040 is about 1959.6020004072. The cubic root of 3840040 is about 156.5952493765.

The spelling of 3840040 in words is "three million, eight hundred forty thousand, forty".