780216 has 64 divisors (see below), whose sum is σ = 2160000. Its totient is φ = 233856.

The previous prime is 780211. The next prime is 780223. The reversal of 780216 is 612087.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (780211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13195 + ... + 13253.

It is an arithmetic number, because the mean of its divisors is an integer number (33750).

2⁷⁸⁰²¹⁶ is an apocalyptic number.

780216 is a gapful number since it is divisible by the number (76) 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 780216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1080000).

780216 is an abundant number, since it is smaller than the sum of its proper divisors (1379784).

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

780216 is a wasteful number, since it uses less digits than its factorization.

780216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116 (or 112 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 780216 is about 883.2983640877. The cubic root of 780216 is about 92.0601371155.

The spelling of 780216 in words is "seven hundred eighty thousand, two hundred sixteen".