3213918 has 48 divisors (see below), whose sum is σ = 7665840. Its totient is φ = 1005696.

The previous prime is 3213893. The next prime is 3213937. The reversal of 3213918 is 8193123.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 3213891 and 3213900.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8068 + ... + 8456.

It is an arithmetic number, because the mean of its divisors is an integer number (159705).

Almost surely, 2^3213918 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3213918, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3832920).

3213918 is an abundant number, since it is smaller than the sum of its proper divisors (4451922).

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

3213918 is a wasteful number, since it uses less digits than its factorization.

3213918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 423 (or 411 counting only the distinct ones).

The product of its digits is 1296, while the sum is 27.

The square root of 3213918 is about 1792.7403604538. The cubic root of 3213918 is about 147.5745940805.

The spelling of 3213918 in words is "three million, two hundred thirteen thousand, nine hundred eighteen".