3878240 has 24 divisors (see below), whose sum is σ = 9162720. Its totient is φ = 1551232.

The previous prime is 3878221. The next prime is 3878263. The reversal of 3878240 is 428783.

3878240 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 3878197 and 3878206.

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 3 ways as a sum of consecutive naturals, for example, 11960 + ... + 12279.

It is an arithmetic number, because the mean of its divisors is an integer number (381780).

Almost surely, 2^3878240 is an apocalyptic number.

It is an amenable number.

3878240 is an abundant number, since it is smaller than the sum of its proper divisors (5284480).

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

3878240 is a wasteful number, since it uses less digits than its factorization.

3878240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24254 (or 24246 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 32.

The square root of 3878240 is about 1969.3247573724. The cubic root of 3878240 is about 157.1127970837.

The spelling of 3878240 in words is "three million, eight hundred seventy-eight thousand, two hundred forty".