Search a number
12688788 = 2237151057
BaseRepresentation
bin110000011001…
…110110010100
3212212122202010
4300121312110
511222020123
61131544220
7212565360
oct60316624
925778663
1012688788
117187302
1242bb070
132823678
1419842a0
1511a9993
hexc19d94

12688788 has 24 divisors (see below), whose sum is σ = 33836992. Its totient is φ = 3625344.

The previous prime is 12688771. The next prime is 12688811. The reversal of 12688788 is 88788621.

It is a super-2 number, since 2×126887882 = 322010681817888, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75445 + ... + 75612.

Almost surely, 212688788 is an apocalyptic number.

It is an amenable number.

12688788 is an abundant number, since it is smaller than the sum of its proper divisors (21148204).

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

12688788 is a wasteful number, since it uses less digits than its factorization.

12688788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151071 (or 151069 counting only the distinct ones).

The product of its digits is 344064, while the sum is 48.

The square root of 12688788 is about 3562.1325073613. The cubic root of 12688788 is about 233.2419769345.

The spelling of 12688788 in words is "twelve million, six hundred eighty-eight thousand, seven hundred eighty-eight".