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1108809 = 38132
BaseRepresentation
bin100001110101101001001
32002100000000
410032231021
5240440214
635433213
712265452
oct4165511
92070000
101108809
11698079
12455809
132ca900
1420c129
1516d809
hex10eb49

1108809 has 27 divisors (see below), whose sum is σ = 1800903. Its totient is φ = 682344.

The previous prime is 1108801. The next prime is 1108817. The reversal of 1108809 is 9088011.

The square root of 1108809 is 1053.

It is a perfect power (a square), and thus also a powerful number.

It is an interprime number because it is at equal distance from previous prime (1108801) and next prime (1108817).

It can be written as a sum of positive squares in only one way, i.e., 164025 + 944784 = 405^2 + 972^2 .

It is a tau number, because it is divible by the number of its divisors (27).

It is not a de Polignac number, because 1108809 - 23 = 1108801 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (1108801) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 85287 + ... + 85299.

21108809 is an apocalyptic number.

1108809 is the 1053-rd square number.

1108809 is the 527-th centered octagonal number.

It is an amenable number.

1108809 is a deficient number, since it is larger than the sum of its proper divisors (692094).

1108809 is an frugal number, since it uses more digits than its factorization.

1108809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50 (or 16 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 27.

The cubic root of 1108809 is about 103.5028354611.

Multiplying 1108809 by its product of nonzero digits (576), we get a square (638673984 = 252722).

It can be divided in two parts, 110880 and 9, that added together give a square (110889 = 3332).

The spelling of 1108809 in words is "one million, one hundred eight thousand, eight hundred nine".

Divisors: 1 3 9 13 27 39 81 117 169 243 351 507 729 1053 1521 2187 3159 4563 6561 9477 13689 28431 41067 85293 123201 369603 1108809