428620220 has 48 divisors (see below), whose sum is σ = 1031159808. Its totient is φ = 146602560.

The previous prime is 428620219. The next prime is 428620223. The reversal of 428620220 is 22026824.

It is a self number, because there is not a number n which added to its sum of digits gives 428620220.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428620223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58565 + ... + 65475.

It is an arithmetic number, because the mean of its divisors is an integer number (21482496).

Almost surely, 2^428620220 is an apocalyptic number.

It is an amenable number.

428620220 is an abundant number, since it is smaller than the sum of its proper divisors (602539588).

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

428620220 is a wasteful number, since it uses less digits than its factorization.

428620220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7370 (or 7368 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 26.

The square root of 428620220 is about 20703.1451716883. The cubic root of 428620220 is about 753.9760515111.

The spelling of 428620220 in words is "four hundred twenty-eight million, six hundred twenty thousand, two hundred twenty".