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68906750 = 2531125057
BaseRepresentation
bin1000001101101…
…10111011111110
311210122211021212
410012312323332
5120120004000
610500524422
71464461213
oct406667376
9153584255
1068906750
1135994730
121b0b0712
1311378033
149219b0a
1560b1c35
hex41b6efe

68906750 has 32 divisors (see below), whose sum is σ = 140725728. Its totient is φ = 25056000.

The previous prime is 68906743. The next prime is 68906791. The reversal of 68906750 is 5760986.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 68906698 and 68906707.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 9779 + ... + 15278.

It is an arithmetic number, because the mean of its divisors is an integer number (4397679).

Almost surely, 268906750 is an apocalyptic number.

68906750 is an abundant number, since it is smaller than the sum of its proper divisors (71818978).

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

68906750 is a wasteful number, since it uses less digits than its factorization.

68906750 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25085 (or 25075 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 41.

The square root of 68906750 is about 8301.0089748175. The cubic root of 68906750 is about 409.9717410624.

The spelling of 68906750 in words is "sixty-eight million, nine hundred six thousand, seven hundred fifty".

Divisors: 1 2 5 10 11 22 25 50 55 110 125 250 275 550 1375 2750 25057 50114 125285 250570 275627 551254 626425 1252850 1378135 2756270 3132125 6264250 6890675 13781350 34453375 68906750