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68232385 = 5134572297
BaseRepresentation
bin1000001000100…
…10010011000001
311202101120020101
410010102103001
5114431414020
610434242401
71455652144
oct404222301
9152346211
1068232385
1135574001
121aa26401
13111a00c0
1490c205b
155ecc00a
hex41124c1

68232385 has 16 divisors (see below), whose sum is σ = 88408656. Its totient is φ = 50254848.

The previous prime is 68232377. The next prime is 68232397. The reversal of 68232385 is 58323286.

It can be written as a sum of positive squares in 8 ways, for example, as 400689 + 67831696 = 633^2 + 8236^2 .

It is a cyclic number.

It is not a de Polignac number, because 68232385 - 23 = 68232377 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28557 + ... + 30853.

It is an arithmetic number, because the mean of its divisors is an integer number (5525541).

Almost surely, 268232385 is an apocalyptic number.

68232385 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

68232385 is a deficient number, since it is larger than the sum of its proper divisors (20176271).

68232385 is a wasteful number, since it uses less digits than its factorization.

68232385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2772.

The product of its digits is 69120, while the sum is 37.

The square root of 68232385 is about 8260.2896438321. The cubic root of 68232385 is about 408.6299400808.

Subtracting from 68232385 its reverse (58323286), we obtain a palindrome (9909099).

The spelling of 68232385 in words is "sixty-eight million, two hundred thirty-two thousand, three hundred eighty-five".

Divisors: 1 5 13 65 457 2285 2297 5941 11485 29705 29861 149305 1049729 5248645 13646477 68232385