428658280 has 64 divisors (see below), whose sum is σ = 1022187600. Its totient is φ = 161495040.

The previous prime is 428658277. The next prime is 428658289. The reversal of 428658280 is 82856824.

It can be written as a sum of positive squares in 8 ways, for example, as 73034116 + 355624164 = 8546^2 + 18858^2 .

It is not an unprimeable number, because it can be changed into a prime (428658289) 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, 43054 + ... + 52066.

Almost surely, 2^428658280 is an apocalyptic number.

428658280 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 428658280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (511093800).

428658280 is an abundant number, since it is smaller than the sum of its proper divisors (593529320).

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

428658280 is a wasteful number, since it uses less digits than its factorization.

428658280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9094 (or 9090 counting only the distinct ones).

The product of its (nonzero) digits is 245760, while the sum is 43.

The square root of 428658280 is about 20704.0643352942. The cubic root of 428658280 is about 753.9983676765.

The spelling of 428658280 in words is "four hundred twenty-eight million, six hundred fifty-eight thousand, two hundred eighty".