428776 has 8 divisors (see below), whose sum is σ = 803970. Its totient is φ = 214384.

The previous prime is 428759. The next prime is 428777. The reversal of 428776 is 677824.

It can be written as a sum of positive squares in only one way, i.e., 276676 + 152100 = 526^2 + 390^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (428777) by changing a digit.

428776 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, 26791 + ... + 26806.

2⁴²⁸⁷⁷⁶ is an apocalyptic number.

It is an amenable number.

428776 is a deficient number, since it is larger than the sum of its proper divisors (375194).

428776 is a wasteful number, since it uses less digits than its factorization.

428776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53603 (or 53599 counting only the distinct ones).

The product of its digits is 18816, while the sum is 34.

The square root of 428776 is about 654.8098960767. The cubic root of 428776 is about 75.4067383462.

The spelling of 428776 in words is "four hundred twenty-eight thousand, seven hundred seventy-six".