3531040 has 48 divisors (see below), whose sum is σ = 8641080. Its totient is φ = 1361920.

The previous prime is 3531037. The next prime is 3531041. The reversal of 3531040 is 401353.

It can be written as a sum of positive squares in 4 ways, for example, as 1648656 + 1882384 = 1284^2 + 1372^2 .

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3531041) 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, 4260 + ... + 5020.

Almost surely, 2^3531040 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 3531040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4320540).

3531040 is an abundant number, since it is smaller than the sum of its proper divisors (5110040).

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

3531040 is a wasteful number, since it uses less digits than its factorization.

3531040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 805 (or 797 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 16.

The square root of 3531040 is about 1879.1061704970. The cubic root of 3531040 is about 152.2769650157.

Adding to 3531040 its reverse (401353), we get a palindrome (3932393).

The spelling of 3531040 in words is "three million, five hundred thirty-one thousand, forty".