3543840 has 144 divisors (see below), whose sum is σ = 12737088. Its totient is φ = 895488.

The previous prime is 3543821. The next prime is 3543857. The reversal of 3543840 is 483453.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (144).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33067 + ... + 33173.

It is an arithmetic number, because the mean of its divisors is an integer number (88452).

Almost surely, 2^3543840 is an apocalyptic number.

3543840 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 3543840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6368544).

3543840 is an abundant number, since it is smaller than the sum of its proper divisors (9193248).

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

3543840 is a wasteful number, since it uses less digits than its factorization.

3543840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151 (or 140 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 3543840 is about 1882.5089641221. The cubic root of 3543840 is about 152.4607441733.

The spelling of 3543840 in words is "three million, five hundred forty-three thousand, eight hundred forty".