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8023681 = 193471217
BaseRepresentation
bin11110100110111010000001
3120002122102101
4132212322001
54023224211
6443550401
7125125441
oct36467201
916078371
108023681
114590346
12282b401
13187c153
1410cc121
15a875c1
hex7a6e81

8023681 has 8 divisors (see below), whose sum is σ = 8477280. Its totient is φ = 7573248.

The previous prime is 8023669. The next prime is 8023739. The reversal of 8023681 is 1863208.

8023681 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 8023681 - 27 = 8023553 is a prime.

It is a super-2 number, since 2×80236812 = 128758913579522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8023601) 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, 5985 + ... + 7201.

It is an arithmetic number, because the mean of its divisors is an integer number (1059660).

Almost surely, 28023681 is an apocalyptic number.

8023681 is the 1792-nd centered pentagonal number.

It is an amenable number.

8023681 is a deficient number, since it is larger than the sum of its proper divisors (453599).

8023681 is a wasteful number, since it uses less digits than its factorization.

8023681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1583.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 8023681 is about 2832.6102802892. The cubic root of 8023681 is about 200.1971472676.

Adding to 8023681 its reverse (1863208), we get a palindrome (9886889).

The spelling of 8023681 in words is "eight million, twenty-three thousand, six hundred eighty-one".

Divisors: 1 19 347 1217 6593 23123 422299 8023681