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10808831 = 11982621
BaseRepresentation
bin101001001110…
…110111111111
3202100010221002
4221032313333
510231340311
61023400515
7160605425
oct51166777
922303832
1010808831
116112920
12375313b
132315a77
141615115
15e3793b
hexa4edff

10808831 has 4 divisors (see below), whose sum is σ = 11791464. Its totient is φ = 9826200.

The previous prime is 10808771. The next prime is 10808857. The reversal of 10808831 is 13880801.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13880801 = 111261891.

It is a cyclic number.

It is not a de Polignac number, because 10808831 - 218 = 10546687 is a prime.

It is a super-2 number, since 2×108088312 = 233661655173122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10808794 and 10808803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10808531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 491300 + ... + 491321.

It is an arithmetic number, because the mean of its divisors is an integer number (2947866).

Almost surely, 210808831 is an apocalyptic number.

10808831 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

10808831 is a deficient number, since it is larger than the sum of its proper divisors (982633).

10808831 is an equidigital number, since it uses as much as digits as its factorization.

10808831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 982632.

The product of its (nonzero) digits is 1536, while the sum is 29.

The square root of 10808831 is about 3287.6786643466. The cubic root of 10808831 is about 221.1021210643.

The spelling of 10808831 in words is "ten million, eight hundred eight thousand, eight hundred thirty-one".

Divisors: 1 11 982621 10808831