428545 has 16 divisors (see below), whose sum is σ = 584640. Its totient is φ = 298944.

The previous prime is 428539. The next prime is 428551. The reversal of 428545 is 545824.

428545 = 47² + 48² + ... + 111².

It is an interprime number because it is at equal distance from previous prime (428539) and next prime (428551).

It is a cyclic number.

It is not a de Polignac number, because 428545 - 2⁹ = 428033 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1062 + ... + 1408.

It is an arithmetic number, because the mean of its divisors is an integer number (36540).

2⁴²⁸⁵⁴⁵ is an apocalyptic number.

It is an amenable number.

428545 is a deficient number, since it is larger than the sum of its proper divisors (156095).

428545 is a wasteful number, since it uses less digits than its factorization.

428545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 384.

The product of its digits is 6400, while the sum is 28.

The square root of 428545 is about 654.6334852419. The cubic root of 428545 is about 75.3931943002.

The spelling of 428545 in words is "four hundred twenty-eight thousand, five hundred forty-five".