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388388063 = 7219417173
BaseRepresentation
bin10111001001100…
…101010011011111
31000001211011021002
4113021211103133
51243411404223
6102312300515
712424146500
oct2711452337
91001734232
10388388063
1118a264778
12aa0a173b
136260712b
1439820ba7
152416ce28
hex172654df

388388063 has 12 divisors (see below), whose sum is σ = 475578360. Its totient is φ = 315382032.

The previous prime is 388388047. The next prime is 388388089. The reversal of 388388063 is 360883883.

It is a happy number.

It is not a de Polignac number, because 388388063 - 24 = 388388047 is a prime.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 388387999 and 388388017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (388388003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 207656 + ... + 209517.

It is an arithmetic number, because the mean of its divisors is an integer number (39631530).

Almost surely, 2388388063 is an apocalyptic number.

388388063 is a deficient number, since it is larger than the sum of its proper divisors (87190297).

388388063 is a wasteful number, since it uses less digits than its factorization.

388388063 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 417206 (or 417199 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 47.

The square root of 388388063 is about 19707.5635987811. The cubic root of 388388063 is about 729.6063825320.

The spelling of 388388063 in words is "three hundred eighty-eight million, three hundred eighty-eight thousand, sixty-three".

Divisors: 1 7 19 49 133 931 417173 2920211 7926287 20441477 55484009 388388063