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138115494 = 23211697553
BaseRepresentation
bin10000011101101…
…11100110100110
3100121212222211200
420032313212212
5240324143434
621412143330
73264651036
oct1016674646
9317788750
10138115494
1170a65240
123a307b46
13227ca65a
14144b38c6
15c1d3199
hex83b79a6

138115494 has 24 divisors (see below), whose sum is σ = 326455272. Its totient is φ = 41853120.

The previous prime is 138115477. The next prime is 138115499. The reversal of 138115494 is 494511831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138115499) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 348579 + ... + 348974.

It is an arithmetic number, because the mean of its divisors is an integer number (13602303).

Almost surely, 2138115494 is an apocalyptic number.

138115494 is an abundant number, since it is smaller than the sum of its proper divisors (188339778).

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

138115494 is a wasteful number, since it uses less digits than its factorization.

138115494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 697572 (or 697569 counting only the distinct ones).

The product of its digits is 17280, while the sum is 36.

The square root of 138115494 is about 11752.2548474750. The cubic root of 138115494 is about 516.9090474734.

The spelling of 138115494 in words is "one hundred thirty-eight million, one hundred fifteen thousand, four hundred ninety-four".

Divisors: 1 2 3 6 9 11 18 22 33 66 99 198 697553 1395106 2092659 4185318 6277977 7673083 12555954 15346166 23019249 46038498 69057747 138115494