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663604228 = 22731764521
BaseRepresentation
bin100111100011011…
…100110000000100
31201020200120212101
4213203130300010
52324340313403
6145503201444
722305354130
oct4743346004
91636616771
10663604228
11310650751
121662a6284
13a7638231
14641c23c0
153d3d371d
hex278dcc04

663604228 has 24 divisors (see below), whose sum is σ = 1370023424. Its totient is φ = 275227200.

The previous prime is 663604189. The next prime is 663604289. The reversal of 663604228 is 822406366.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 381393 + ... + 383128.

Almost surely, 2663604228 is an apocalyptic number.

It is an amenable number.

663604228 is an abundant number, since it is smaller than the sum of its proper divisors (706419196).

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

663604228 is a wasteful number, since it uses less digits than its factorization.

663604228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 764563 (or 764561 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 37.

The square root of 663604228 is about 25760.5168426412. The cubic root of 663604228 is about 872.2407679710.

The spelling of 663604228 in words is "six hundred sixty-three million, six hundred four thousand, two hundred twenty-eight".

Divisors: 1 2 4 7 14 28 31 62 124 217 434 868 764521 1529042 3058084 5351647 10703294 21406588 23700151 47400302 94800604 165901057 331802114 663604228