Search a number
-
+
131369008 = 2423356981
BaseRepresentation
bin1111101010010…
…00100000110000
3100011012020101211
413311020200300
5232112302013
621011405504
73153422011
oct765104060
9304166354
10131369008
1168177531
1237bb3894
13212a7954
1413639008
15b7ee23d
hex7d48830

131369008 has 20 divisors (see below), whose sum is σ = 265594608. Its totient is φ = 62828480.

The previous prime is 131368969. The next prime is 131369009. The reversal of 131369008 is 800963131.

It is not an unprimeable number, because it can be changed into a prime (131369009) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 178123 + ... + 178858.

Almost surely, 2131369008 is an apocalyptic number.

131369008 is the 6127-th centered heptagonal number.

It is an amenable number.

131369008 is an abundant number, since it is smaller than the sum of its proper divisors (134225600).

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

131369008 is a wasteful number, since it uses less digits than its factorization.

131369008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 357012 (or 357006 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 131369008 is about 11461.6319954883. The cubic root of 131369008 is about 508.3517311147.

The spelling of 131369008 in words is "one hundred thirty-one million, three hundred sixty-nine thousand, eight".

Divisors: 1 2 4 8 16 23 46 92 184 368 356981 713962 1427924 2855848 5711696 8210563 16421126 32842252 65684504 131369008