3533640 has 64 divisors (see below), whose sum is σ = 11568960. Its totient is φ = 856320.

The previous prime is 3533633. The next prime is 3533653. The reversal of 3533640 is 463353.

It is a super-2 number, since 2×3533640² = 24973223299200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 3533640.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19 + ... + 2658.

It is an arithmetic number, because the mean of its divisors is an integer number (180765).

Almost surely, 2^3533640 is an apocalyptic number.

3533640 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 3533640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5784480).

3533640 is an abundant number, since it is smaller than the sum of its proper divisors (8035320).

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

3533640 is a wasteful number, since it uses less digits than its factorization.

3533640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2702 (or 2698 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 24.

The square root of 3533640 is about 1879.7978614734. The cubic root of 3533640 is about 152.3143310583.

Adding to 3533640 its reverse (463353), we get a palindrome (3996993).

It can be divided in two parts, 353 and 3640, that added together give a palindrome (3993).

The spelling of 3533640 in words is "three million, five hundred thirty-three thousand, six hundred forty".