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138631468 = 2260157667
BaseRepresentation
bin10000100001101…
…01100100101100
3100122212012121211
420100311210230
5240442201333
621431204204
73302230243
oct1020654454
9318765554
10138631468
1171287968
123a516664
132294b471
14145a995a
15c285ecd
hex843592c

138631468 has 12 divisors (see below), whose sum is σ = 243012952. Its totient is φ = 69199200.

The previous prime is 138631421. The next prime is 138631469. The reversal of 138631468 is 864136831.

It is a happy number.

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 self number, because there is not a number n which added to its sum of digits gives 138631468.

It is not an unprimeable number, because it can be changed into a prime (138631469) 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, 26430 + ... + 31237.

Almost surely, 2138631468 is an apocalyptic number.

It is an amenable number.

138631468 is a deficient number, since it is larger than the sum of its proper divisors (104381484).

138631468 is a wasteful number, since it uses less digits than its factorization.

138631468 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58272 (or 58270 counting only the distinct ones).

The product of its digits is 82944, while the sum is 40.

The square root of 138631468 is about 11774.1865111777. The cubic root of 138631468 is about 517.5519398341.

The spelling of 138631468 in words is "one hundred thirty-eight million, six hundred thirty-one thousand, four hundred sixty-eight".

Divisors: 1 2 4 601 1202 2404 57667 115334 230668 34657867 69315734 138631468