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491136 = 2731279
BaseRepresentation
bin1110111111010000000
3220221201020
41313322000
5111204021
614305440
74113612
oct1677200
9827636
10491136
11305aa8
121b8280
13142719
159a7c6
hex77e80

491136 has 32 divisors (see below), whose sum is σ = 1305600. Its totient is φ = 163584.

The previous prime is 491129. The next prime is 491137. The reversal of 491136 is 631194.

It is a tau number, because it is divible by the number of its divisors (32).

It is a hoax number, since the sum of its digits (24) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (491137) by changing a digit.

491136 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 256 + ... + 1023.

It is an arithmetic number, because the mean of its divisors is an integer number (40800).

2491136 is an apocalyptic number.

It is an amenable number.

491136 is an abundant number, since it is smaller than the sum of its proper divisors (814464).

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

491136 is a wasteful number, since it uses less digits than its factorization.

491136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1296 (or 1284 counting only the distinct ones).

The product of its digits is 648, while the sum is 24.

The square root of 491136 is about 700.8109588184. The cubic root of 491136 is about 78.8982292569.

The spelling of 491136 in words is "four hundred ninety-one thousand, one hundred thirty-six".