3851840 has 28 divisors (see below), whose sum is σ = 9172956. Its totient is φ = 1540608.

The previous prime is 3851839. The next prime is 3851857. The reversal of 3851840 is 481583.

It can be written as a sum of positive squares in 2 ways, for example, as 495616 + 3356224 = 704^2 + 1832^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5699 + ... + 6338.

Almost surely, 2^3851840 is an apocalyptic number.

It is an amenable number.

3851840 is an abundant number, since it is smaller than the sum of its proper divisors (5321116).

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

3851840 is a wasteful number, since it uses less digits than its factorization.

3851840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12054 (or 12044 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 29.

The square root of 3851840 is about 1962.6105064429. The cubic root of 3851840 is about 156.7554850729.

The spelling of 3851840 in words is "three million, eight hundred fifty-one thousand, eight hundred forty".