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136243040 = 255851519
BaseRepresentation
bin10000001111011…
…10011101100000
3100111100212022112
420013232131200
5234334234130
621304054452
73243022013
oct1007563540
9314325275
10136243040
116a9a645a
1239764428
13222c32ab
141414737a
15be63495
hex81ee760

136243040 has 24 divisors (see below), whose sum is σ = 321874560. Its totient is φ = 54497152.

The previous prime is 136243021. The next prime is 136243043. The reversal of 136243040 is 40342631.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 136242997 and 136243015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136243043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 425600 + ... + 425919.

It is an arithmetic number, because the mean of its divisors is an integer number (13411440).

Almost surely, 2136243040 is an apocalyptic number.

136243040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

136243040 is an abundant number, since it is smaller than the sum of its proper divisors (185631520).

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

136243040 is an equidigital number, since it uses as much as digits as its factorization.

136243040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 851534 (or 851526 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 136243040 is about 11672.3193924772. The cubic root of 136243040 is about 514.5624712631.

Adding to 136243040 its reverse (40342631), we get a palindrome (176585671).

The spelling of 136243040 in words is "one hundred thirty-six million, two hundred forty-three thousand, forty".

Divisors: 1 2 4 5 8 10 16 20 32 40 80 160 851519 1703038 3406076 4257595 6812152 8515190 13624304 17030380 27248608 34060760 68121520 136243040