220777420 has 24 divisors (see below), whose sum is σ = 464164848. Its totient is φ = 88209600.

The previous prime is 220777399. The next prime is 220777423. The reversal of 220777420 is 24777022.

220777420 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (220777423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12955 + ... + 24685.

It is an arithmetic number, because the mean of its divisors is an integer number (19340202).

Almost surely, 2^220777420 is an apocalyptic number.

220777420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

220777420 is an abundant number, since it is smaller than the sum of its proper divisors (243387428).

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

220777420 is a wasteful number, since it uses less digits than its factorization.

220777420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12681 (or 12679 counting only the distinct ones).

The product of its (nonzero) digits is 10976, while the sum is 31.

The square root of 220777420 is about 14858.5806859202. The cubic root of 220777420 is about 604.3913191557.

The spelling of 220777420 in words is "two hundred twenty million, seven hundred seventy-seven thousand, four hundred twenty".