785218220 has 48 divisors (see below), whose sum is σ = 1706025216. Its totient is φ = 303264000.

The previous prime is 785218211. The next prime is 785218223. The reversal of 785218220 is 22812587.

It is not an unprimeable number, because it can be changed into a prime (785218223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 334250 + ... + 336590.

It is an arithmetic number, because the mean of its divisors is an integer number (35542192).

Almost surely, 2^785218220 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 785218220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (853012608).

785218220 is an abundant number, since it is smaller than the sum of its proper divisors (920806996).

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

785218220 is a wasteful number, since it uses less digits than its factorization.

785218220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2922 (or 2920 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 35.

The square root of 785218220 is about 28021.7454845340. The cubic root of 785218220 is about 922.5646069767.

The spelling of 785218220 in words is "seven hundred eighty-five million, two hundred eighteen thousand, two hundred twenty".