3213540 has 96 divisors (see below), whose sum is σ = 10926720. Its totient is φ = 777600.

The previous prime is 3213499. The next prime is 3213559. The reversal of 3213540 is 453123.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5670 + ... + 6210.

It is an arithmetic number, because the mean of its divisors is an integer number (113820).

Almost surely, 2^3213540 is an apocalyptic number.

3213540 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 3213540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5463360).

3213540 is an abundant number, since it is smaller than the sum of its proper divisors (7713180).

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

3213540 is a wasteful number, since it uses less digits than its factorization.

3213540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 570 (or 562 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 3213540 is about 1792.6349321599. The cubic root of 3213540 is about 147.5688082677.

Adding to 3213540 its reverse (453123), we get a palindrome (3666663).

The spelling of 3213540 in words is "three million, two hundred thirteen thousand, five hundred forty".