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BaseRepresentation
bin10000100010111…
…01011000001100
3100200011111021100
420101131120030
5241012411013
621434503100
73303506466
oct1021353014
9320144240
10138794508
1171389406
123a594a90
13229a7738
141460d136
15c2b9473
hex845d60c

138794508 has 36 divisors (see below), whose sum is σ = 351878800. Its totient is φ = 46128096.

The previous prime is 138794507. The next prime is 138794567. The reversal of 138794508 is 805497831.

138794508 is a `hidden beast` number, since 138 + 7 + 9 + 4 + 508 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-3 number, since 3×1387945083 (a number of 25 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (138794507) 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 11 ways as a sum of consecutive naturals, for example, 7041 + ... + 18087.

Almost surely, 2138794508 is an apocalyptic number.

138794508 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

138794508 is an abundant number, since it is smaller than the sum of its proper divisors (213084292).

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

138794508 is a wasteful number, since it uses less digits than its factorization.

138794508 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11406 (or 11401 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The square root of 138794508 is about 11781.1080972886. The cubic root of 138794508 is about 517.7547523979.

The spelling of 138794508 in words is "one hundred thirty-eight million, seven hundred ninety-four thousand, five hundred eight".