3581040 has 80 divisors (see below), whose sum is σ = 11392128. Its totient is φ = 930048.

The previous prime is 3581029. The next prime is 3581041. The reversal of 3581040 is 401853.

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

It is a junction number, because it is equal to n+sod(n) for n = 3580998 and 3581016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3581041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10147 + ... + 10493.

Almost surely, 2^3581040 is an apocalyptic number.

3581040 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 3581040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5696064).

3581040 is an abundant number, since it is smaller than the sum of its proper divisors (7811088).

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

3581040 is a wasteful number, since it uses less digits than its factorization.

3581040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 406 (or 400 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 3581040 is about 1892.3636014255. The cubic root of 3581040 is about 152.9923529862.

Adding to 3581040 its reverse (401853), we get a palindrome (3982893).

The spelling of 3581040 in words is "three million, five hundred eighty-one thousand, forty".