428788 has 6 divisors (see below), whose sum is σ = 750386. Its totient is φ = 214392.

The previous prime is 428777. The next prime is 428797. The reversal of 428788 is 887824.

It can be written as a sum of positive squares in only one way, i.e., 219024 + 209764 = 468^2 + 458^2 .

It is a congruent number.

It is an unprimeable number.

428788 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53595 + ... + 53602.

2⁴²⁸⁷⁸⁸ is an apocalyptic number.

It is an amenable number.

428788 is a deficient number, since it is larger than the sum of its proper divisors (321598).

428788 is a wasteful number, since it uses less digits than its factorization.

428788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107201 (or 107199 counting only the distinct ones).

The product of its digits is 28672, while the sum is 37.

The square root of 428788 is about 654.8190589774. The cubic root of 428788 is about 75.4074418001.

The spelling of 428788 in words is "four hundred twenty-eight thousand, seven hundred eighty-eight".