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12884890 = 2510911821
BaseRepresentation
bin110001001001…
…101110011010
3220020121202011
4301021232122
511244304030
61140100134
7214343164
oct61115632
926217664
1012884890
117300677
12439464a
1328919c5
1419d5934
1511e7b2a
hexc49b9a

12884890 has 16 divisors (see below), whose sum is σ = 23407560. Its totient is φ = 5106240.

The previous prime is 12884887. The next prime is 12884891. The reversal of 12884890 is 9848821.

12884890 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 9186961 + 3697929 = 3031^2 + 1923^2 .

It is not an unprimeable number, because it can be changed into a prime (12884891) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4821 + ... + 7000.

Almost surely, 212884890 is an apocalyptic number.

12884890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12884890 is a deficient number, since it is larger than the sum of its proper divisors (10522670).

12884890 is a wasteful number, since it uses less digits than its factorization.

12884890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11937.

The product of its (nonzero) digits is 36864, while the sum is 40.

The square root of 12884890 is about 3589.5528969497. The cubic root of 12884890 is about 234.4374047752.

The spelling of 12884890 in words is "twelve million, eight hundred eighty-four thousand, eight hundred ninety".

Divisors: 1 2 5 10 109 218 545 1090 11821 23642 59105 118210 1288489 2576978 6442445 12884890