220847820 has 96 divisors (see below), whose sum is σ = 647414208. Its totient is φ = 56189952.

The previous prime is 220847819. The next prime is 220847831. The reversal of 220847820 is 28748022.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 116722 + ... + 118598.

It is an arithmetic number, because the mean of its divisors is an integer number (6743898).

Almost surely, 2^220847820 is an apocalyptic number.

220847820 is a gapful number since it is divisible by the number (20) 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 220847820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (323707104).

220847820 is an abundant number, since it is smaller than the sum of its proper divisors (426566388).

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

220847820 is a wasteful number, since it uses less digits than its factorization.

220847820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1979 (or 1977 counting only the distinct ones).

The product of its (nonzero) digits is 14336, while the sum is 33.

The square root of 220847820 is about 14860.9494986020. The cubic root of 220847820 is about 604.4555537244.

The spelling of 220847820 in words is "two hundred twenty million, eight hundred forty-seven thousand, eight hundred twenty".