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12973808 = 241942677
BaseRepresentation
bin110001011111…
…011011110000
3220102010201102
4301133123300
511310130213
61142023532
7215163341
oct61373360
926363642
1012973808
117361461
124417ba8
1328c3313
141a1a0c8
151214158
hexc5f6f0

12973808 has 20 divisors (see below), whose sum is σ = 26460360. Its totient is φ = 6145344.

The previous prime is 12973801. The next prime is 12973819. The reversal of 12973808 is 80837921.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12973801) 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, 21035 + ... + 21642.

It is an arithmetic number, because the mean of its divisors is an integer number (1323018).

Almost surely, 212973808 is an apocalyptic number.

It is an amenable number.

12973808 is an abundant number, since it is smaller than the sum of its proper divisors (13486552).

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

12973808 is a wasteful number, since it uses less digits than its factorization.

12973808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42704 (or 42698 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 12973808 is about 3601.9172672342. The cubic root of 12973808 is about 234.9754493743.

It can be divided in two parts, 129 and 73808, that added together give a palindrome (73937).

The spelling of 12973808 in words is "twelve million, nine hundred seventy-three thousand, eight hundred eight".

Divisors: 1 2 4 8 16 19 38 76 152 304 42677 85354 170708 341416 682832 810863 1621726 3243452 6486904 12973808