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23978 = 219631
BaseRepresentation
bin101110110101010
31012220002
411312222
51231403
6303002
7126623
oct56652
935802
1023978
1117019
1211a62
13abb6
148a4a
157188
hex5daa

23978 has 8 divisors (see below), whose sum is σ = 37920. Its totient is φ = 11340.

The previous prime is 23977. The next prime is 23981. The reversal of 23978 is 87932.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 23978.

It is not an unprimeable number, because it can be changed into a prime (23971) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 278 + ... + 353.

It is an arithmetic number, because the mean of its divisors is an integer number (4740).

223978 is an apocalyptic number.

23978 is a deficient number, since it is larger than the sum of its proper divisors (13942).

23978 is a wasteful number, since it uses less digits than its factorization.

23978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 652.

The product of its digits is 3024, while the sum is 29.

The square root of 23978 is about 154.8483128742. The cubic root of 23978 is about 28.8361749643.

It can be divided in two parts, 23 and 978, that added together give a palindrome (1001).

The spelling of 23978 in words is "twenty-three thousand, nine hundred seventy-eight".

Divisors: 1 2 19 38 631 1262 11989 23978