3881040 has 80 divisors (see below), whose sum is σ = 12225408. Its totient is φ = 1018368.

The previous prime is 3881029. The next prime is 3881057. The reversal of 3881040 is 401883.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 3881040.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24642 + ... + 24798.

Almost surely, 2^3881040 is an apocalyptic number.

3881040 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3881040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6112704).

3881040 is an abundant number, since it is smaller than the sum of its proper divisors (8344368).

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

3881040 is a wasteful number, since it uses less digits than its factorization.

3881040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276 (or 270 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 3881040 is about 1970.0355326745. The cubic root of 3881040 is about 157.1505985954.

The spelling of 3881040 in words is "three million, eight hundred eighty-one thousand, forty".