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1109988 = 2232112803
BaseRepresentation
bin100001110111111100100
32002101121200
410032333210
5241004423
635442500
712302055
oct4167744
92071550
101109988
11698a50
12456430
132cb2c9
1420c72c
1516dd43
hex10efe4

1109988 has 36 divisors (see below), whose sum is σ = 3061968. Its totient is φ = 336240.

The previous prime is 1109987. The next prime is 1110007. The reversal of 1109988 is 8899011.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (1109987) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1006 + ... + 1797.

21109988 is an apocalyptic number.

1109988 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1109988 is an abundant number, since it is smaller than the sum of its proper divisors (1951980).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1109988 is a wasteful number, since it uses less digits than its factorization.

1109988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2824 (or 2819 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 36.

The square root of 1109988 is about 1053.5596803219. The cubic root of 1109988 is about 103.5395074268.

The spelling of 1109988 in words is "one million, one hundred nine thousand, nine hundred eighty-eight".

Divisors: 1 2 3 4 6 9 11 12 18 22 33 36 44 66 99 132 198 396 2803 5606 8409 11212 16818 25227 30833 33636 50454 61666 92499 100908 123332 184998 277497 369996 554994 1109988