Base | Representation |
---|---|
bin | 110101000110… |
… | …111010010100 |
3 | 222012022022102 |
4 | 311012322110 |
5 | 12031000230 |
6 | 1214221232 |
7 | 226222514 |
oct | 65067224 |
9 | 28168272 |
10 | 13921940 |
11 | 794983a |
12 | 47b4818 |
13 | 2b65a46 |
14 | 1bc5844 |
15 | 1350045 |
hex | d46e94 |
13921940 has 24 divisors (see below), whose sum is σ = 29455272. Its totient is φ = 5527040.
The previous prime is 13921937. The next prime is 13921949. The reversal of 13921940 is 4912931.
It is a happy number.
13921940 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It can be written as a sum of positive squares in 4 ways, for example, as 364816 + 13557124 = 604^2 + 3682^2 .
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (13921949) 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, 200 + ... + 5280.
It is an arithmetic number, because the mean of its divisors is an integer number (1227303).
Almost surely, 213921940 is an apocalyptic number.
13921940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.
It is an amenable number.
13921940 is an abundant number, since it is smaller than the sum of its proper divisors (15533332).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
13921940 is a wasteful number, since it uses less digits than its factorization.
13921940 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 5227 (or 5225 counting only the distinct ones).
The product of its (nonzero) digits is 1944, while the sum is 29.
The square root of 13921940 is about 3731.2115994674. The cubic root of 13921940 is about 240.5654491414.
Subtracting from 13921940 its reverse (4912931), we obtain a palindrome (9009009).
The spelling of 13921940 in words is "thirteen million, nine hundred twenty-one thousand, nine hundred forty".
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