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138191476 = 2255576217
BaseRepresentation
bin10000011110010…
…10001001110100
3100122000212001211
420033022021310
5240334111401
621413531204
73265415413
oct1017121164
9318025054
10138191476
1171007335
123a343b04
1322826107
14144d347a
15c1ea951
hex83ca274

138191476 has 12 divisors (see below), whose sum is σ = 241917508. Its totient is φ = 69072192.

The previous prime is 138191369. The next prime is 138191477. The reversal of 138191476 is 674191831.

It can be written as a sum of positive squares in 2 ways, for example, as 118156900 + 20034576 = 10870^2 + 4476^2 .

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138191477) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19120 + ... + 25336.

Almost surely, 2138191476 is an apocalyptic number.

It is an amenable number.

138191476 is a deficient number, since it is larger than the sum of its proper divisors (103726032).

138191476 is a wasteful number, since it uses less digits than its factorization.

138191476 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11778 (or 11776 counting only the distinct ones).

The product of its digits is 36288, while the sum is 40.

The square root of 138191476 is about 11755.4870592417. The cubic root of 138191476 is about 517.0038198072.

The spelling of 138191476 in words is "one hundred thirty-eight million, one hundred ninety-one thousand, four hundred seventy-six".

Divisors: 1 2 4 5557 6217 11114 12434 22228 24868 34547869 69095738 138191476