3877840 has 20 divisors (see below), whose sum is σ = 9016164. Its totient is φ = 1551104.

The previous prime is 3877837. The next prime is 3877849. The reversal of 3877840 is 487783.

It can be written as a sum of positive squares in 2 ways, for example, as 506944 + 3370896 = 712^2 + 1836^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a self number, because there is not a number n which added to its sum of digits gives 3877840.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3877849) 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, 24157 + ... + 24316.

Almost surely, 2^3877840 is an apocalyptic number.

It is an amenable number.

3877840 is an abundant number, since it is smaller than the sum of its proper divisors (5138324).

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

3877840 is a wasteful number, since it uses less digits than its factorization.

3877840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48486 (or 48480 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 37.

The square root of 3877840 is about 1969.2231971008. The cubic root of 3877840 is about 157.1073953826.

The spelling of 3877840 in words is "three million, eight hundred seventy-seven thousand, eight hundred forty".