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69888049 = 711907637
BaseRepresentation
bin1000010101001…
…10100000110001
311212111200101021
410022212200301
5120342404144
610533535441
71506016150
oct412464061
9155450337
1069888049
11364a4a20
121b4a4581
131162c89a
1493d3597
156207884
hex42a6831

69888049 has 8 divisors (see below), whose sum is σ = 87133248. Its totient is φ = 54458160.

The previous prime is 69888047. The next prime is 69888059. The reversal of 69888049 is 94088896.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 69888049 - 21 = 69888047 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 69887987 and 69888005.

It is not an unprimeable number, because it can be changed into a prime (69888047) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 453742 + ... + 453895.

It is an arithmetic number, because the mean of its divisors is an integer number (10891656).

Almost surely, 269888049 is an apocalyptic number.

It is an amenable number.

69888049 is a deficient number, since it is larger than the sum of its proper divisors (17245199).

69888049 is a wasteful number, since it uses less digits than its factorization.

69888049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 907655.

The product of its (nonzero) digits is 995328, while the sum is 52.

The square root of 69888049 is about 8359.9072363274. The cubic root of 69888049 is about 411.9087070322.

The spelling of 69888049 in words is "sixty-nine million, eight hundred eighty-eight thousand, forty-nine".

Divisors: 1 7 11 77 907637 6353459 9984007 69888049