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1268000881 = 7250872
BaseRepresentation
bin100101110010100…
…0010100001110001
310021100222010012121
41023211002201301
510044102012011
6325453354241
743264554400
oct11345024161
93240863177
101268000881
115a0831914
122b4798981
131729130a4
14c0591637
15764bde71
hex4b942871

1268000881 has 9 divisors (see below), whose sum is σ = 1475311449. Its totient is φ = 1086644244.

The previous prime is 1268000869. The next prime is 1268000939. The reversal of 1268000881 is 1880008621.

The square root of 1268000881 is 35609.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 1268000881 - 27 = 1268000753 is a prime.

It is a super-2 number, since 2×12680008812 = 3215652468433552322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1268000861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 246720 + ... + 251806.

Almost surely, 21268000881 is an apocalyptic number.

1268000881 is the 35609-th square number.

1268000881 is the 17805-th centered octagonal number.

It is an amenable number.

1268000881 is a deficient number, since it is larger than the sum of its proper divisors (207310568).

1268000881 is an frugal number, since it uses more digits than its factorization.

1268000881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10188 (or 5094 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 34.

The cubic root of 1268000881 is about 1082.3636165244.

The spelling of 1268000881 in words is "one billion, two hundred sixty-eight million, eight hundred eighty-one", and thus it is an aban number.

Divisors: 1 7 49 5087 35609 249263 25877569 181142983 1268000881