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12388213 = 472291151
BaseRepresentation
bin101111010000…
…011101110101
3212022101102201
4233100131311
511132410323
61121304501
7210204145
oct57203565
925271381
1012388213
116aa14a2
124195131
132749906
141906925
15114a8ad
hexbd0775

12388213 has 8 divisors (see below), whose sum is σ = 12718080. Its totient is φ = 12061200.

The previous prime is 12388199. The next prime is 12388219. The reversal of 12388213 is 31288321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12388213 - 29 = 12387701 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12388219) 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, 10188 + ... + 11338.

It is an arithmetic number, because the mean of its divisors is an integer number (1589760).

Almost surely, 212388213 is an apocalyptic number.

It is an amenable number.

12388213 is a deficient number, since it is larger than the sum of its proper divisors (329867).

12388213 is a wasteful number, since it uses less digits than its factorization.

12388213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1427.

The product of its digits is 2304, while the sum is 28.

The square root of 12388213 is about 3519.6893328815. The cubic root of 12388213 is about 231.3855433284.

The spelling of 12388213 in words is "twelve million, three hundred eighty-eight thousand, two hundred thirteen".

Divisors: 1 47 229 1151 10763 54097 263579 12388213