3216780 has 192 divisors, whose sum is σ = 12257280. Its totient is φ = 684288.

The previous prime is 3216779. The next prime is 3216781. The reversal of 3216780 is 876123.

It is an interprime number because it is at equal distance from previous prime (3216779) and next prime (3216781).

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

It is not an unprimeable number, because it can be changed into a prime (3216781) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 86922 + ... + 86958.

It is an arithmetic number, because the mean of its divisors is an integer number (63840).

Almost surely, 2^3216780 is an apocalyptic number.

3216780 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 3216780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6128640).

3216780 is an abundant number, since it is smaller than the sum of its proper divisors (9040500).

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

3216780 is a wasteful number, since it uses less digits than its factorization.

3216780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85 (or 77 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 3216780 is about 1793.5384021537. The cubic root of 3216780 is about 147.6183862349.

The spelling of 3216780 in words is "three million, two hundred sixteen thousand, seven hundred eighty".