Search a number
11131908 = 2232353761
BaseRepresentation
bin101010011101…
…110000000100
3202221120002220
4222131300010
510322210113
61034332340
7163422354
oct52356004
922846086
1011131908
116313627
12388a0b0
1323c9b38
14169ab64
15e9d523
hexa9dc04

11131908 has 48 divisors (see below), whose sum is σ = 27651456. Its totient is φ = 3477760.

The previous prime is 11131907. The next prime is 11131921. The reversal of 11131908 is 80913111.

It is not an unprimeable number, because it can be changed into a prime (11131907) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14248 + ... + 15008.

It is an arithmetic number, because the mean of its divisors is an integer number (576072).

Almost surely, 211131908 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11131908, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13825728).

11131908 is an abundant number, since it is smaller than the sum of its proper divisors (16519548).

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

11131908 is a wasteful number, since it uses less digits than its factorization.

11131908 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 844 (or 842 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 24.

The square root of 11131908 is about 3336.4514083079. The cubic root of 11131908 is about 223.2834511500.

The spelling of 11131908 in words is "eleven million, one hundred thirty-one thousand, nine hundred eight".