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667488 = 25317409
BaseRepresentation
bin10100010111101100000
31020220121210
42202331200
5132324423
622150120
75450013
oct2427540
91226553
10667488
11416548
12282340
131a4a83
1413537a
15d2b93
hexa2f60

667488 has 48 divisors (see below), whose sum is σ = 1859760. Its totient is φ = 208896.

The previous prime is 667487. The next prime is 667501. The reversal of 667488 is 884766.

It is a Cunningham number, because it is equal to 8172-1.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667487) 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, 1428 + ... + 1836.

It is an arithmetic number, because the mean of its divisors is an integer number (38745).

2667488 is an apocalyptic number.

667488 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 667488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (929880).

667488 is an abundant number, since it is smaller than the sum of its proper divisors (1192272).

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

667488 is a wasteful number, since it uses less digits than its factorization.

667488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 439 (or 431 counting only the distinct ones).

The product of its digits is 64512, while the sum is 39.

The square root of 667488 is about 816.9993880047. Note that the first 3 decimals coincide. The cubic root of 667488 is about 87.3939067888.

The spelling of 667488 in words is "six hundred sixty-seven thousand, four hundred eighty-eight".

Divisors: 1 2 3 4 6 8 12 16 17 24 32 34 48 51 68 96 102 136 204 272 408 409 544 816 818 1227 1632 1636 2454 3272 4908 6544 6953 9816 13088 13906 19632 20859 27812 39264 41718 55624 83436 111248 166872 222496 333744 667488