428733220 has 24 divisors (see below), whose sum is σ = 921279744. Its totient is φ = 167504736.

The previous prime is 428733211. The next prime is 428733223. The reversal of 428733220 is 22337824.

It is not an unprimeable number, because it can be changed into a prime (428733223) 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, 248404 + ... + 250123.

It is an arithmetic number, because the mean of its divisors is an integer number (38386656).

Almost surely, 2^428733220 is an apocalyptic number.

It is an amenable number.

428733220 is an abundant number, since it is smaller than the sum of its proper divisors (492546524).

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

428733220 is a wasteful number, since it uses less digits than its factorization.

428733220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 498579 (or 498577 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 31.

The square root of 428733220 is about 20705.8740457871. The cubic root of 428733220 is about 754.0423042633.

The spelling of 428733220 in words is "four hundred twenty-eight million, seven hundred thirty-three thousand, two hundred twenty".