3216020 has 18 divisors (see below), whose sum is σ = 6770526. Its totient is φ = 1283200.

The previous prime is 3216007. The next prime is 3216023. The reversal of 3216020 is 206123.

It can be written as a sum of positive squares in 3 ways, for example, as 2298256 + 917764 = 1516^2 + 958^2 .

It is a junction number, because it is equal to n+sod(n) for n = 3215986 and 3216004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3216023) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7820 + ... + 8220.

Almost surely, 2^3216020 is an apocalyptic number.

It is an amenable number.

3216020 is an abundant number, since it is smaller than the sum of its proper divisors (3554506).

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

3216020 is an equidigital number, since it uses as much as digits as its factorization.

3216020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 811 (or 408 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 3216020 is about 1793.3265179548. The cubic root of 3216020 is about 147.6067598249.

The spelling of 3216020 in words is "three million, two hundred sixteen thousand, twenty".