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1288116 = 223311927
BaseRepresentation
bin100111010011110110100
32102102222000
410322132310
5312204431
643335300
713643304
oct4723664
92372860
101288116
117aa865
12521530
133613cb
14257604
151a69e6
hex13a7b4

1288116 has 24 divisors (see below), whose sum is σ = 3339840. Its totient is φ = 429336.

The previous prime is 1288109. The next prime is 1288117. The reversal of 1288116 is 6118821.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1288116.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1288117) 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, 5856 + ... + 6071.

It is an arithmetic number, because the mean of its divisors is an integer number (139160).

21288116 is an apocalyptic number.

It is an amenable number.

1288116 is an abundant number, since it is smaller than the sum of its proper divisors (2051724).

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

1288116 is a wasteful number, since it uses less digits than its factorization.

1288116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11940 (or 11932 counting only the distinct ones).

The product of its digits is 768, while the sum is 27.

The square root of 1288116 is about 1134.9519813631. The cubic root of 1288116 is about 108.8057027360.

The spelling of 1288116 in words is "one million, two hundred eighty-eight thousand, one hundred sixteen".

Divisors: 1 2 3 4 6 9 12 18 27 36 54 108 11927 23854 35781 47708 71562 107343 143124 214686 322029 429372 644058 1288116