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12697960 = 2351128859
BaseRepresentation
bin110000011100…
…000101101000
3212220010022211
4300130011220
511222313320
61132054504
7212634202
oct60340550
925803284
1012697960
117193190
124304434
1328278b2
141987772
1511ac55a
hexc1c168

12697960 has 32 divisors (see below), whose sum is σ = 31168800. Its totient is φ = 4617280.

The previous prime is 12697933. The next prime is 12697967. The reversal of 12697960 is 6979621.

It is a super-2 number, since 2×126979602 = 322476376323200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (12697967) 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, 13990 + ... + 14869.

It is an arithmetic number, because the mean of its divisors is an integer number (974025).

Almost surely, 212697960 is an apocalyptic number.

12697960 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12697960 is an abundant number, since it is smaller than the sum of its proper divisors (18470840).

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

12697960 is a wasteful number, since it uses less digits than its factorization.

12697960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28881 (or 28877 counting only the distinct ones).

The product of its (nonzero) digits is 40824, while the sum is 40.

The square root of 12697960 is about 3563.4197058444. The cubic root of 12697960 is about 233.2981624993.

It can be divided in two parts, 1269 and 7960, that added together give a palindrome (9229).

The spelling of 12697960 in words is "twelve million, six hundred ninety-seven thousand, nine hundred sixty".

Divisors: 1 2 4 5 8 10 11 20 22 40 44 55 88 110 220 440 28859 57718 115436 144295 230872 288590 317449 577180 634898 1154360 1269796 1587245 2539592 3174490 6348980 12697960