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669688 = 2397863
BaseRepresentation
bin10100011011111111000
31021000122021
42203133320
5132412223
622204224
75456305
oct2433770
91230567
10669688
11418168
12283674
131a5a86
141360ac
15d365d
hexa37f8

669688 has 16 divisors (see below), whose sum is σ = 1270080. Its totient is φ = 331008.

The previous prime is 669679. The next prime is 669689. The reversal of 669688 is 886966.

Together with 600392 it forms an amicable pair .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669689) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 345 + ... + 1207.

It is an arithmetic number, because the mean of its divisors is an integer number (79380).

2669688 is an apocalyptic number.

It is an amenable number.

669688 is a deficient number, since it is larger than the sum of its proper divisors (600392).

669688 is a wasteful number, since it uses less digits than its factorization.

669688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 966 (or 962 counting only the distinct ones).

The product of its digits is 124416, while the sum is 43.

The square root of 669688 is about 818.3446706615. The cubic root of 669688 is about 87.4898165019.

The spelling of 669688 in words is "six hundred sixty-nine thousand, six hundred eighty-eight".

Divisors: 1 2 4 8 97 194 388 776 863 1726 3452 6904 83711 167422 334844 669688