3553840 has 40 divisors (see below), whose sum is σ = 8535168. Its totient is φ = 1374720.

The previous prime is 3553819. The next prime is 3553843. The reversal of 3553840 is 483553.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Smith number, since the sum of its digits (28) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 3553799 and 3553808.

It is not an unprimeable number, because it can be changed into a prime (3553843) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1764 + ... + 3196.

Almost surely, 2^3553840 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 3553840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4267584).

3553840 is an abundant number, since it is smaller than the sum of its proper divisors (4981328).

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

3553840 is a wasteful number, since it uses less digits than its factorization.

3553840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1477 (or 1471 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 3553840 is about 1885.1631229154. The cubic root of 3553840 is about 152.6040139636.

The spelling of 3553840 in words is "three million, five hundred fifty-three thousand, eight hundred forty".