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663438 = 23110573
BaseRepresentation
bin10100001111110001110
31020201001210
42201332032
5132212223
622115250
75432136
oct2417616
91221053
10663438
114134a6
1227bb26
131a2c89
14133ac6
15d1893
hexa1f8e

663438 has 8 divisors (see below), whose sum is σ = 1326888. Its totient is φ = 221144.

The previous prime is 663437. The next prime is 663463. The reversal of 663438 is 834366.

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

663438 is an admirable number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 663438.

It is not an unprimeable number, because it can be changed into a prime (663437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55281 + ... + 55292.

It is an arithmetic number, because the mean of its divisors is an integer number (165861).

2663438 is an apocalyptic number.

663438 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

663438 is a wasteful number, since it uses less digits than its factorization.

663438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110578.

The product of its digits is 10368, while the sum is 30.

The square root of 663438 is about 814.5170348127. The cubic root of 663438 is about 87.2167931914.

It can be divided in two parts, 6 and 63438, that multiplied together give a triangular number (380628 = T872).

The spelling of 663438 in words is "six hundred sixty-three thousand, four hundred thirty-eight".

Divisors: 1 2 3 6 110573 221146 331719 663438