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204424 = 231123101
BaseRepresentation
bin110001111010001000
3101101102021
4301322020
523020144
64214224
71510663
oct617210
9341367
10204424
1112a650
129a374
137207c
14546da
1540884
hex31e88

204424 has 32 divisors (see below), whose sum is σ = 440640. Its totient is φ = 88000.

The previous prime is 204397. The next prime is 204427. The reversal of 204424 is 424402.

It is a junction number, because it is equal to n+sod(n) for n = 204398 and 204407.

It is not an unprimeable number, because it can be changed into a prime (204427) by changing a digit.

204424 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 7 ways as a sum of consecutive naturals, for example, 1974 + ... + 2074.

It is an arithmetic number, because the mean of its divisors is an integer number (13770).

2204424 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 204424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (220320).

204424 is an abundant number, since it is smaller than the sum of its proper divisors (236216).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

204424 is a wasteful number, since it uses less digits than its factorization.

204424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141 (or 137 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 16.

The square root of 204424 is about 452.1327238765. The cubic root of 204424 is about 58.9084090715.

Adding to 204424 its reverse (424402), we get a palindrome (628826).

It can be divided in two parts, 20 and 4424, that added together give a palindrome (4444).

The spelling of 204424 in words is "two hundred four thousand, four hundred twenty-four", and thus it is an iban number.

Divisors: 1 2 4 8 11 22 23 44 46 88 92 101 184 202 253 404 506 808 1012 1111 2024 2222 2323 4444 4646 8888 9292 18584 25553 51106 102212 204424