428028280 has 32 divisors (see below), whose sum is σ = 965001600. Its totient is φ = 170866816.

The previous prime is 428028217. The next prime is 428028281. The reversal of 428028280 is 82820824.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428028281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9849 + ... + 30871.

It is an arithmetic number, because the mean of its divisors is an integer number (30156300).

Almost surely, 2^428028280 is an apocalyptic number.

428028280 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

428028280 is an abundant number, since it is smaller than the sum of its proper divisors (536973320).

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

428028280 is a wasteful number, since it uses less digits than its factorization.

428028280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21543 (or 21539 counting only the distinct ones).

The product of its (nonzero) digits is 16384, while the sum is 34.

The square root of 428028280 is about 20688.8443369851. The cubic root of 428028280 is about 753.6288022238.

The spelling of 428028280 in words is "four hundred twenty-eight million, twenty-eight thousand, two hundred eighty".