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1228828 = 221721063
BaseRepresentation
bin100101100000000011100
32022102122011
410230000130
5303310303
642201004
713305406
oct4540034
92272564
101228828
1176a267
124b3164
13340423
1423db76
1519416d
hex12c01c

1228828 has 18 divisors (see below), whose sum is σ = 2286536. Its totient is φ = 577728.

The previous prime is 1228789. The next prime is 1228837. The reversal of 1228828 is 8288221.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 1228828.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 625 + ... + 1687.

21228828 is an apocalyptic number.

It is an amenable number.

1228828 is a deficient number, since it is larger than the sum of its proper divisors (1057708).

1228828 is a wasteful number, since it uses less digits than its factorization.

1228828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1101 (or 1082 counting only the distinct ones).

The product of its digits is 4096, while the sum is 31.

The square root of 1228828 is about 1108.5251463093. The cubic root of 1228828 is about 107.1100855540.

The spelling of 1228828 in words is "one million, two hundred twenty-eight thousand, eight hundred twenty-eight".

Divisors: 1 2 4 17 34 68 289 578 1063 1156 2126 4252 18071 36142 72284 307207 614414 1228828