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648427 = 13311609
BaseRepresentation
bin10011110010011101011
31012221110211
42132103223
5131222202
621521551
75340313
oct2362353
91187424
10648427
1140319a
122732b7
131991b0
1412c443
15cc1d7
hex9e4eb

648427 has 8 divisors (see below), whose sum is σ = 721280. Its totient is φ = 578880.

The previous prime is 648391. The next prime is 648433. The reversal of 648427 is 724846.

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 648427 - 211 = 646379 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

648427 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648437) 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, 402 + ... + 1207.

It is an arithmetic number, because the mean of its divisors is an integer number (90160).

2648427 is an apocalyptic number.

648427 is the 403-rd decagonal number.

648427 is a deficient number, since it is larger than the sum of its proper divisors (72853).

648427 is a wasteful number, since it uses less digits than its factorization.

648427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1653.

The product of its digits is 10752, while the sum is 31.

The square root of 648427 is about 805.2496507295. The cubic root of 648427 is about 86.5539774699.

The spelling of 648427 in words is "six hundred forty-eight thousand, four hundred twenty-seven".

Divisors: 1 13 31 403 1609 20917 49879 648427