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670478 = 21372447
BaseRepresentation
bin10100011101100001110
31021001201112
42203230032
5132423403
622212022
75461514
oct2435416
91231645
10670478
11418816
12284012
131a6243
141364b4
15d39d8
hexa3b0e

670478 has 8 divisors (see below), whose sum is σ = 1013472. Its totient is φ = 332656.

The previous prime is 670471. The next prime is 670487. The reversal of 670478 is 874076.

670478 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (670471) by changing a digit.

670478 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, 950 + ... + 1497.

It is an arithmetic number, because the mean of its divisors is an integer number (126684).

2670478 is an apocalyptic number.

670478 is a deficient number, since it is larger than the sum of its proper divisors (342994).

670478 is a wasteful number, since it uses less digits than its factorization.

670478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2586.

The product of its (nonzero) digits is 9408, while the sum is 32.

The square root of 670478 is about 818.8272100999. The cubic root of 670478 is about 87.5242055482.

The spelling of 670478 in words is "six hundred seventy thousand, four hundred seventy-eight".

Divisors: 1 2 137 274 2447 4894 335239 670478