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109438138 = 2198932359
BaseRepresentation
bin1101000010111…
…10010010111010
321121221000220101
412201132102322
5211004010023
614505350014
72466131425
oct641362272
9247830811
10109438138
1156858547
123079830a
13198996c4
141076a9bc
15991b1ad
hex685e4ba

109438138 has 16 divisors (see below), whose sum is σ = 174744000. Its totient is φ = 51255072.

The previous prime is 109438123. The next prime is 109438151. The reversal of 109438138 is 831834901.

It is a junction number, because it is equal to n+sod(n) for n = 109438097 and 109438106.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12798 + ... + 19561.

It is an arithmetic number, because the mean of its divisors is an integer number (10921500).

Almost surely, 2109438138 is an apocalyptic number.

109438138 is a deficient number, since it is larger than the sum of its proper divisors (65305862).

109438138 is a wasteful number, since it uses less digits than its factorization.

109438138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32469.

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 109438138 is about 10461.2684699323. The cubic root of 109438138 is about 478.3247998197.

The spelling of 109438138 in words is "one hundred nine million, four hundred thirty-eight thousand, one hundred thirty-eight".

Divisors: 1 2 19 38 89 178 1691 3382 32359 64718 614821 1229642 2879951 5759902 54719069 109438138