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69680056 = 2361142787
BaseRepresentation
bin1000010011100…
…11101110111000
311212010010001211
410021303232320
5120314230211
610525252504
71504161565
oct411635670
9155103054
1069680056
1136372726
121b404134
1311589004
14937b86c
1561b5e21
hex4273bb8

69680056 has 16 divisors (see below), whose sum is σ = 132792840. Its totient is φ = 34268640.

The previous prime is 69680053. The next prime is 69680063. The reversal of 69680056 is 65008696.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (69680053) 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, 70906 + ... + 71881.

Almost surely, 269680056 is an apocalyptic number.

It is an amenable number.

69680056 is a deficient number, since it is larger than the sum of its proper divisors (63112784).

69680056 is a wasteful number, since it uses less digits than its factorization.

69680056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142854 (or 142850 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 40.

The square root of 69680056 is about 8347.4580561989. The cubic root of 69680056 is about 411.4996754406.

The spelling of 69680056 in words is "sixty-nine million, six hundred eighty thousand, fifty-six".

Divisors: 1 2 4 8 61 122 244 488 142787 285574 571148 1142296 8710007 17420014 34840028 69680056