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404980 = 22520249
BaseRepresentation
bin1100010110111110100
3202120112021
41202313310
5100424410
612402524
73304462
oct1426764
9676467
10404980
112572a4
12176444
13112444
14a7832
157eeda
hex62df4

404980 has 12 divisors (see below), whose sum is σ = 850500. Its totient is φ = 161984.

The previous prime is 404977. The next prime is 404981. The reversal of 404980 is 89404.

It can be written as a sum of positive squares in 2 ways, for example, as 132496 + 272484 = 364^2 + 522^2 .

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10105 + ... + 10144.

It is an arithmetic number, because the mean of its divisors is an integer number (70875).

2404980 is an apocalyptic number.

It is an amenable number.

404980 is an abundant number, since it is smaller than the sum of its proper divisors (445520).

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

404980 is a wasteful number, since it uses less digits than its factorization.

404980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20258 (or 20256 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 404980 is about 636.3803893899. The cubic root of 404980 is about 73.9851443274.

The spelling of 404980 in words is "four hundred four thousand, nine hundred eighty".

Divisors: 1 2 4 5 10 20 20249 40498 80996 101245 202490 404980