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23985287 = 374197163
BaseRepresentation
bin101101101111…
…1110010000111
31200010120121222
41123133302013
522120012122
62214030555
7410604644
oct133376207
950116558
1023985287
11125a2557
12804845b
134c7a3a1
143284dcb
15218bb42
hex16dfc87

23985287 has 16 divisors (see below), whose sum is σ = 25650912. Its totient is φ = 22394880.

The previous prime is 23985281. The next prime is 23985307. The reversal of 23985287 is 78258932.

It is a cyclic number.

It is not a de Polignac number, because 23985287 - 26 = 23985223 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23985281) 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, 147068 + ... + 147230.

It is an arithmetic number, because the mean of its divisors is an integer number (1603182).

Almost surely, 223985287 is an apocalyptic number.

23985287 is a deficient number, since it is larger than the sum of its proper divisors (1665625).

23985287 is a wasteful number, since it uses less digits than its factorization.

23985287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 338.

The product of its digits is 241920, while the sum is 44.

The square root of 23985287 is about 4897.4776160795. The cubic root of 23985287 is about 288.3909580737.

The spelling of 23985287 in words is "twenty-three million, nine hundred eighty-five thousand, two hundred eighty-seven".

Divisors: 1 37 41 97 163 1517 3589 3977 6031 6683 15811 147149 247271 585007 648251 23985287