3213240 has 32 divisors (see below), whose sum is σ = 9640080. Its totient is φ = 856832.

The previous prime is 3213239. The next prime is 3213269. The reversal of 3213240 is 423123.

It is a super-2 number, since 2×3213240² = 20649822595200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13269 + ... + 13508.

Almost surely, 2^3213240 is an apocalyptic number.

3213240 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3213240 is an abundant number, since it is smaller than the sum of its proper divisors (6426840).

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

3213240 is a wasteful number, since it uses less digits than its factorization.

3213240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26791 (or 26787 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 3213240 is about 1792.5512544973. The cubic root of 3213240 is about 147.5642160299.

Adding to 3213240 its reverse (423123), we get a palindrome (3636363).

The spelling of 3213240 in words is "three million, two hundred thirteen thousand, two hundred forty".