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11091985 = 57330389
BaseRepresentation
bin101010010100…
…000000010001
3202212112100021
4222110000101
510314420420
61033423441
7163165102
oct52240021
922775307
1011091985
116296633
12386ab81
1323b4908
14168a3a9
15e917aa
hexa94011

11091985 has 8 divisors (see below), whose sum is σ = 13493160. Its totient is φ = 8751744.

The previous prime is 11091959. The next prime is 11092001. The reversal of 11091985 is 58919011.

It can be written as a sum of positive squares in 4 ways, for example, as 2163841 + 8928144 = 1471^2 + 2988^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11091985 - 29 = 11091473 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11091985.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14830 + ... + 15559.

It is an arithmetic number, because the mean of its divisors is an integer number (1686645).

Almost surely, 211091985 is an apocalyptic number.

It is an amenable number.

11091985 is a deficient number, since it is larger than the sum of its proper divisors (2401175).

11091985 is an equidigital number, since it uses as much as digits as its factorization.

11091985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30467.

The product of its (nonzero) digits is 3240, while the sum is 34.

The square root of 11091985 is about 3330.4631810005. The cubic root of 11091985 is about 223.0162066687.

The spelling of 11091985 in words is "eleven million, ninety-one thousand, nine hundred eighty-five".

Divisors: 1 5 73 365 30389 151945 2218397 11091985