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139617856 = 26722112
BaseRepresentation
bin10000101001001…
…10011001000000
3100201201022200201
420110212121000
5241220232411
621504254544
73313506100
oct1024463100
9321638621
10139617856
11718a0a64
123a911454
1322c05421
1414785200
15c3cd3c1
hex8526640

139617856 has 63 divisors (see below), whose sum is σ = 323822187. Its totient is φ = 59552640.

The previous prime is 139617853. The next prime is 139617857. The reversal of 139617856 is 658716931.

It is a happy number.

The square root of 139617856 is 11816.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139617851) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 661591 + ... + 661801.

Almost surely, 2139617856 is an apocalyptic number.

139617856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

139617856 is the 11816-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 139617856

139617856 is an abundant number, since it is smaller than the sum of its proper divisors (184204331).

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

139617856 is an frugal number, since it uses more digits than its factorization.

139617856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 448 (or 220 counting only the distinct ones).

The product of its digits is 272160, while the sum is 46.

The cubic root of 139617856 is about 518.7765319376.

The spelling of 139617856 in words is "one hundred thirty-nine million, six hundred seventeen thousand, eight hundred fifty-six".

Divisors: 1 2 4 7 8 14 16 28 32 49 56 64 98 112 196 211 224 392 422 448 784 844 1477 1568 1688 2954 3136 3376 5908 6752 10339 11816 13504 20678 23632 41356 44521 47264 82712 89042 94528 165424 178084 311647 330848 356168 623294 661696 712336 1246588 1424672 2181529 2493176 2849344 4363058 4986352 8726116 9972704 17452232 19945408 34904464 69808928 139617856