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23868481 = 713318461
BaseRepresentation
bin101101100001…
…1010001000001
31122220122101211
41123003101001
522102242411
62211330121
7406610260
oct133032101
948818354
1023868481
111252281a
127bb0941
134c39180
1432545d7
152167221
hex16c3441

23868481 has 16 divisors (see below), whose sum is σ = 30327808. Its totient is φ = 18273600.

The previous prime is 23868463. The next prime is 23868491. The reversal of 23868481 is 18486832.

It is a 5-Lehmer number, since φ(23868481) divides (23868481-1)5.

It is a cyclic number.

It is not a de Polignac number, because 23868481 - 29 = 23867969 is a prime.

It is a super-2 number, since 2×238684812 = 1139408770494722, which contains 22 as substring.

It is a deceptive number, since it divides R23868480.

It is not an unprimeable number, because it can be changed into a prime (23868401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1410 + ... + 7051.

It is an arithmetic number, because the mean of its divisors is an integer number (1895488).

Almost surely, 223868481 is an apocalyptic number.

23868481 is the 2821-st octagonal number.

It is an amenable number.

23868481 is a deficient number, since it is larger than the sum of its proper divisors (6459327).

23868481 is a wasteful number, since it uses less digits than its factorization.

23868481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8512.

The product of its digits is 73728, while the sum is 40.

The square root of 23868481 is about 4885.5379437683. The cubic root of 23868481 is about 287.9220508244.

The spelling of 23868481 in words is "twenty-three million, eight hundred sixty-eight thousand, four hundred eighty-one".

Divisors: 1 7 13 31 91 217 403 2821 8461 59227 109993 262291 769951 1836037 3409783 23868481