428650 has 12 divisors (see below), whose sum is σ = 797382. Its totient is φ = 171440.

The previous prime is 428639. The next prime is 428657. The reversal of 428650 is 56824.

It can be written as a sum of positive squares in 3 ways, for example, as 281961 + 146689 = 531^2 + 383^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (428657) by changing a digit.

428650 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 in 5 ways as a sum of consecutive naturals, for example, 4237 + ... + 4336.

2⁴²⁸⁶⁵⁰ is an apocalyptic number.

428650 is a deficient number, since it is larger than the sum of its proper divisors (368732).

428650 is a wasteful number, since it uses less digits than its factorization.

428650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8585 (or 8580 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 428650 is about 654.7136778776. The cubic root of 428650 is about 75.3993512880.

The spelling of 428650 in words is "four hundred twenty-eight thousand, six hundred fifty".