3881240 has 32 divisors (see below), whose sum is σ = 9527760. Its totient is φ = 1411200.

The previous prime is 3881239. The next prime is 3881249. The reversal of 3881240 is 421883.

3881240 = 485² + 486² + ... + 500².

3881240 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a zygodrome in base 7.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3881249) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 3971 + ... + 4850.

Almost surely, 2^3881240 is an apocalyptic number.

It is an amenable number.

3881240 is an abundant number, since it is smaller than the sum of its proper divisors (5646520).

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

3881240 is a wasteful number, since it uses less digits than its factorization.

3881240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8843 (or 8839 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 3881240 is about 1970.0862925263. The cubic root of 3881240 is about 157.1532980076.

The spelling of 3881240 in words is "three million, eight hundred eighty-one thousand, two hundred forty".