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1828828 = 222391913
BaseRepresentation
bin110111110011111011100
310102220200101
412332133130
5432010303
6103110444
721354601
oct6763734
93386611
101828828
11103a031
12742424
134c0561
143586a8
15261d1d
hex1be7dc

1828828 has 12 divisors (see below), whose sum is σ = 3215520. Its totient is φ = 910112.

The previous prime is 1828793. The next prime is 1828829. The reversal of 1828828 is 8288281.

1828828 is a nontrivial binomial coefficient, being equal to C(1913, 2).

It is a super-2 number, since 2×18288282 = 6689223707168, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1828829) 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, 1 + ... + 1912.

It is an arithmetic number, because the mean of its divisors is an integer number (267960).

21828828 is an apocalyptic number.

1828828 is the 1912-nd triangular number.

1828828 is the 638-th centered nonagonal number.

It is an amenable number.

1828828 is a deficient number, since it is larger than the sum of its proper divisors (1386692).

1828828 is a wasteful number, since it uses less digits than its factorization.

1828828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2156 (or 2154 counting only the distinct ones).

The product of its digits is 16384, while the sum is 37.

The square root of 1828828 is about 1352.3416728031. The cubic root of 1828828 is about 122.2900025635.

The spelling of 1828828 in words is "one million, eight hundred twenty-eight thousand, eight hundred twenty-eight".

Divisors: 1 2 4 239 478 956 1913 3826 7652 457207 914414 1828828