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12997208 = 2372310091
BaseRepresentation
bin110001100101…
…001001011000
3220110022211002
4301211021120
511311402313
61142324132
7215321510
oct61451130
926408732
1012997208
117377aa4
124429648
132900b73
141a24840
15121b058
hexc65258

12997208 has 32 divisors (see below), whose sum is σ = 29064960. Its totient is φ = 5327520.

The previous prime is 12997207. The next prime is 12997213. The reversal of 12997208 is 80279921.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12997207) 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, 3758 + ... + 6333.

It is an arithmetic number, because the mean of its divisors is an integer number (908280).

Almost surely, 212997208 is an apocalyptic number.

It is an amenable number.

12997208 is an abundant number, since it is smaller than the sum of its proper divisors (16067752).

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

12997208 is a wasteful number, since it uses less digits than its factorization.

12997208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10127 (or 10123 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 12997208 is about 3605.1640739362. The cubic root of 12997208 is about 235.1166344221.

The spelling of 12997208 in words is "twelve million, nine hundred ninety-seven thousand, two hundred eight".

Divisors: 1 2 4 7 8 14 23 28 46 56 92 161 184 322 644 1288 10091 20182 40364 70637 80728 141274 232093 282548 464186 565096 928372 1624651 1856744 3249302 6498604 12997208