3218840 has 16 divisors (see below), whose sum is σ = 7242480. Its totient is φ = 1287520.

The previous prime is 3218837. The next prime is 3218843. The reversal of 3218840 is 488123.

It is an interprime number because it is at equal distance from previous prime (3218837) and next prime (3218843).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3218843) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40196 + ... + 40275.

It is an arithmetic number, because the mean of its divisors is an integer number (452655).

Almost surely, 2^3218840 is an apocalyptic number.

It is an amenable number.

3218840 is an abundant number, since it is smaller than the sum of its proper divisors (4023640).

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

3218840 is a wasteful number, since it uses less digits than its factorization.

3218840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80482 (or 80478 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 3218840 is about 1794.1125940141. The cubic root of 3218840 is about 147.6498907193.

The spelling of 3218840 in words is "three million, two hundred eighteen thousand, eight hundred forty".