428780 has 24 divisors (see below), whose sum is σ = 982800. Its totient is φ = 155840.

The previous prime is 428777. The next prime is 428797. The reversal of 428780 is 87824.

428780 = 228² + 229² + ... + 235².

428780 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 755 + ... + 1194.

It is an arithmetic number, because the mean of its divisors is an integer number (40950).

2⁴²⁸⁷⁸⁰ is an apocalyptic number.

It is an amenable number.

428780 is an abundant number, since it is smaller than the sum of its proper divisors (554020).

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

428780 is a wasteful number, since it uses less digits than its factorization.

428780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1969 (or 1967 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 29.

The square root of 428780 is about 654.8129503912. The cubic root of 428780 is about 75.4069728323.

The spelling of 428780 in words is "four hundred twenty-eight thousand, seven hundred eighty".