3887540 has 12 divisors (see below), whose sum is σ = 8163876. Its totient is φ = 1555008.

The previous prime is 3887531. The next prime is 3887549. The reversal of 3887540 is 457883.

It is an interprime number because it is at equal distance from previous prime (3887531) and next prime (3887549).

It can be written as a sum of positive squares in 2 ways, for example, as 487204 + 3400336 = 698^2 + 1844^2 .

It is a super-2 number, since 2×3887540² = 30225934503200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 3887540.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3887549) 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, 97169 + ... + 97208.

It is an arithmetic number, because the mean of its divisors is an integer number (680323).

Almost surely, 2^3887540 is an apocalyptic number.

It is an amenable number.

3887540 is an abundant number, since it is smaller than the sum of its proper divisors (4276336).

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

3887540 is a wasteful number, since it uses less digits than its factorization.

3887540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194386 (or 194384 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 35.

The square root of 3887540 is about 1971.6845589495. The cubic root of 3887540 is about 157.2382820651.

It can be divided in two parts, 38 and 87540, that added together give a palindrome (87578).

The spelling of 3887540 in words is "three million, eight hundred eighty-seven thousand, five hundred forty".