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68131198 = 2231481113
BaseRepresentation
bin1000000111110…
…01100101111110
311202012102102201
410003321211332
5114420144243
610432142114
71455051142
oct403714576
9152172381
1068131198
1135504a83
121a99793a
1311166025
149097222
155eac04d
hex40f997e

68131198 has 8 divisors (see below), whose sum is σ = 106640208. Its totient is φ = 32584464.

The previous prime is 68131181. The next prime is 68131199. The reversal of 68131198 is 89113186.

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 (68131199) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 740511 + ... + 740602.

It is an arithmetic number, because the mean of its divisors is an integer number (13330026).

Almost surely, 268131198 is an apocalyptic number.

68131198 is a deficient number, since it is larger than the sum of its proper divisors (38509010).

68131198 is a wasteful number, since it uses less digits than its factorization.

68131198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1481138.

The product of its digits is 10368, while the sum is 37.

The square root of 68131198 is about 8254.1624650839. The cubic root of 68131198 is about 408.4278439941.

The spelling of 68131198 in words is "sixty-eight million, one hundred thirty-one thousand, one hundred ninety-eight".

Divisors: 1 2 23 46 1481113 2962226 34065599 68131198