428678280 has 48 divisors (see below), whose sum is σ = 1393205580. Its totient is φ = 114314112.

The previous prime is 428678267. The next prime is 428678291. The reversal of 428678280 is 82876824.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 427745124 + 933156 = 20682^2 + 966^2 .

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 595027 + ... + 595746.

Almost surely, 2^428678280 is an apocalyptic number.

428678280 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

428678280 is an abundant number, since it is smaller than the sum of its proper divisors (964527300).

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

428678280 is a wasteful number, since it uses less digits than its factorization.

428678280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1190790 (or 1190783 counting only the distinct ones).

The product of its (nonzero) digits is 344064, while the sum is 45.

The square root of 428678280 is about 20704.5473266140. The cubic root of 428678280 is about 754.0100939812.

The spelling of 428678280 in words is "four hundred twenty-eight million, six hundred seventy-eight thousand, two hundred eighty".