Search a number
-
+
13018808 = 2311239619
BaseRepresentation
bin110001101010…
…011010111000
3220111102110002
4301222122320
511313100213
61143012132
7215441465
oct61523270
926442402
1013018808
117392250
12443a048
13290a94a
141a2c66c
151222658
hexc6a6b8

13018808 has 32 divisors (see below), whose sum is σ = 26784000. Its totient is φ = 5883360.

The previous prime is 13018807. The next prime is 13018823. The reversal of 13018808 is 80881031.

It is a happy number.

13018808 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13018801) 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, 20723 + ... + 21341.

It is an arithmetic number, because the mean of its divisors is an integer number (837000).

Almost surely, 213018808 is an apocalyptic number.

It is an amenable number.

13018808 is an abundant number, since it is smaller than the sum of its proper divisors (13765192).

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

13018808 is a wasteful number, since it uses less digits than its factorization.

13018808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 875 (or 871 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 29.

The square root of 13018808 is about 3608.1585331024. The cubic root of 13018808 is about 235.2468087533.

Adding to 13018808 its reverse (80881031), we get a palindrome (93899839).

The spelling of 13018808 in words is "thirteen million, eighteen thousand, eight hundred eight".

Divisors: 1 2 4 8 11 22 44 88 239 478 619 956 1238 1912 2476 2629 4952 5258 6809 10516 13618 21032 27236 54472 147941 295882 591764 1183528 1627351 3254702 6509404 13018808