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23000138 = 272371429
BaseRepresentation
bin101011110111…
…1010001001010
31121021112020222
41113233101022
521342001023
62140550042
7366332540
oct127572112
947245228
1023000138
1111a8a387
127852322
1349c3b65
1430a9d90
152044cc8
hex15ef44a

23000138 has 16 divisors (see below), whose sum is σ = 41143680. Its totient is φ = 9428496.

The previous prime is 23000137. The next prime is 23000189. The reversal of 23000138 is 83100032.

23000138 = T452 + T453 + ... + T612.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (23000137) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35393 + ... + 36036.

It is an arithmetic number, because the mean of its divisors is an integer number (2571480).

Almost surely, 223000138 is an apocalyptic number.

23000138 is a deficient number, since it is larger than the sum of its proper divisors (18143542).

23000138 is a wasteful number, since it uses less digits than its factorization.

23000138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71461.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 23000138 is about 4795.8459107857. The cubic root of 23000138 is about 284.3872667574.

The spelling of 23000138 in words is "twenty-three million, one hundred thirty-eight", and thus it is an aban number.

Divisors: 1 2 7 14 23 46 161 322 71429 142858 500003 1000006 1642867 3285734 11500069 23000138