220941840 has 160 divisors (see below), whose sum is σ = 787092480. Its totient is φ = 50222592.

The previous prime is 220941821. The next prime is 220941857. The reversal of 220941840 is 48149022.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 220941798 and 220941807.

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, 582771 + ... + 583149.

It is an arithmetic number, because the mean of its divisors is an integer number (4919328).

Almost surely, 2^220941840 is an apocalyptic number.

220941840 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 220941840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (393546240).

220941840 is an abundant number, since it is smaller than the sum of its proper divisors (566150640).

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

220941840 is a wasteful number, since it uses less digits than its factorization.

220941840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 749 (or 743 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 220941840 is about 14864.1124861190. The cubic root of 220941840 is about 604.5413184353.

The spelling of 220941840 in words is "two hundred twenty million, nine hundred forty-one thousand, eight hundred forty".