3555440 has 60 divisors (see below), whose sum is σ = 9626616. Its totient is φ = 1217664.

The previous prime is 3555427. The next prime is 3555443. The reversal of 3555440 is 445553.

It is a plaindrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3555443) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3467 + ... + 4373.

Almost surely, 2^3555440 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3555440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4813308).

3555440 is an abundant number, since it is smaller than the sum of its proper divisors (6071176).

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

3555440 is a wasteful number, since it uses less digits than its factorization.

3555440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 934 (or 921 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 26.

The square root of 3555440 is about 1885.5874416213. The cubic root of 3555440 is about 152.6269121797.

The spelling of 3555440 in words is "three million, five hundred fifty-five thousand, four hundred forty".