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428506 = 21316481
BaseRepresentation
bin1101000100111011010
3210202210121
41220213122
5102203011
613103454
73433201
oct1504732
9722717
10428506
11272a41
12187b8a
13120070
14b2238
1586e71
hex689da

428506 has 8 divisors (see below), whose sum is σ = 692244. Its totient is φ = 197760.

The previous prime is 428503. The next prime is 428509. The reversal of 428506 is 605824.

It is an interprime number because it is at equal distance from previous prime (428503) and next prime (428509).

It can be written as a sum of positive squares in 2 ways, for example, as 403225 + 25281 = 635^2 + 159^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428503) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8215 + ... + 8266.

2428506 is an apocalyptic number.

428506 is a deficient number, since it is larger than the sum of its proper divisors (263738).

428506 is a wasteful number, since it uses less digits than its factorization.

428506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16496.

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

The square root of 428506 is about 654.6036969037. The cubic root of 428506 is about 75.3909071629.

The spelling of 428506 in words is "four hundred twenty-eight thousand, five hundred six".

Divisors: 1 2 13 26 16481 32962 214253 428506