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12938480 = 245161731
BaseRepresentation
bin110001010110…
…110011110000
3220100100020222
4301112303300
511303012410
61141152212
7214655342
oct61266360
926310228
1012938480
117337965
1243bb668
1328b0209
141a0b292
151208955
hexc56cf0

12938480 has 20 divisors (see below), whose sum is σ = 30082152. Its totient is φ = 5175360.

The previous prime is 12938467. The next prime is 12938483. The reversal of 12938480 is 8483921.

It is a happy number.

12938480 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (20).

It is a self number, because there is not a number n which added to its sum of digits gives 12938480.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12938483) 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, 80786 + ... + 80945.

Almost surely, 212938480 is an apocalyptic number.

12938480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12938480 is an abundant number, since it is smaller than the sum of its proper divisors (17143672).

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

12938480 is a wasteful number, since it uses less digits than its factorization.

12938480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161744 (or 161738 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 12938480 is about 3597.0098693220. The cubic root of 12938480 is about 234.7619741711.

The spelling of 12938480 in words is "twelve million, nine hundred thirty-eight thousand, four hundred eighty".

Divisors: 1 2 4 5 8 10 16 20 40 80 161731 323462 646924 808655 1293848 1617310 2587696 3234620 6469240 12938480