220863786 has 64 divisors (see below), whose sum is σ = 527869440. Its totient is φ = 60719040.

The previous prime is 220863749. The next prime is 220863787. The reversal of 220863786 is 687368022.

It is not an unprimeable number, because it can be changed into a prime (220863787) 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 31 ways as a sum of consecutive naturals, for example, 48441 + ... + 52803.

It is an arithmetic number, because the mean of its divisors is an integer number (8247960).

Almost surely, 2^220863786 is an apocalyptic number.

220863786 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 220863786, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (263934720).

220863786 is an abundant number, since it is smaller than the sum of its proper divisors (307005654).

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

220863786 is a wasteful number, since it uses less digits than its factorization.

220863786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4451.

The product of its (nonzero) digits is 193536, while the sum is 42.

The square root of 220863786 is about 14861.4866685672. The cubic root of 220863786 is about 604.4701195686.

The spelling of 220863786 in words is "two hundred twenty million, eight hundred sixty-three thousand, seven hundred eighty-six".