220788940 has 12 divisors (see below), whose sum is σ = 463656816. Its totient is φ = 88315568.

The previous prime is 220788899. The next prime is 220788941. The reversal of 220788940 is 49887022.

220788940 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 220788893 and 220788902.

It is not an unprimeable number, because it can be changed into a prime (220788941) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5519704 + ... + 5519743.

It is an arithmetic number, because the mean of its divisors is an integer number (38638068).

Almost surely, 2^220788940 is an apocalyptic number.

220788940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

220788940 is an abundant number, since it is smaller than the sum of its proper divisors (242867876).

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

220788940 is a wasteful number, since it uses less digits than its factorization.

220788940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11039456 (or 11039454 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 40.

The square root of 220788940 is about 14858.9683356551. The cubic root of 220788940 is about 604.4018312012.

The spelling of 220788940 in words is "two hundred twenty million, seven hundred eighty-eight thousand, nine hundred forty".