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137931848 = 2317241481
BaseRepresentation
bin10000011100010…
…10110001001000
3100121112122220222
420032022301020
5240302304343
621404205212
73263254445
oct1016126110
9317478828
10137931848
117094a26a
123a239808
1322764ba2
14144669cc
15c198a68
hex838ac48

137931848 has 8 divisors (see below), whose sum is σ = 258622230. Its totient is φ = 68965920.

The previous prime is 137931841. The next prime is 137931869. The reversal of 137931848 is 848139731.

It can be written as a sum of positive squares in only one way, i.e., 131285764 + 6646084 = 11458^2 + 2578^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a plaindrome in base 14.

It is a junction number, because it is equal to n+sod(n) for n = 137931799 and 137931808.

It is not an unprimeable number, because it can be changed into a prime (137931841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8620733 + ... + 8620748.

Almost surely, 2137931848 is an apocalyptic number.

It is an amenable number.

137931848 is a deficient number, since it is larger than the sum of its proper divisors (120690382).

137931848 is a wasteful number, since it uses less digits than its factorization.

137931848 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17241487 (or 17241483 counting only the distinct ones).

The product of its digits is 145152, while the sum is 44.

The square root of 137931848 is about 11744.4390244915. The cubic root of 137931848 is about 516.6798422354.

The spelling of 137931848 in words is "one hundred thirty-seven million, nine hundred thirty-one thousand, eight hundred forty-eight".

Divisors: 1 2 4 8 17241481 34482962 68965924 137931848