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30268307869 = 257117775517
BaseRepresentation
bin11100001100001000…
…011011100110011101
32220010110011100120121
4130030020123212131
5443442141322434
621523254514541
72121035241352
oct341410334635
986113140517
1030268307869
1111922741778
125a48965a51
132b14b47957
141671d2c629
15bc24777b4
hex70c21b99d

30268307869 has 4 divisors (see below), whose sum is σ = 30386083644. Its totient is φ = 30150532096.

The previous prime is 30268307821. The next prime is 30268307879. The reversal of 30268307869 is 96870386203.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16710732900 + 13557574969 = 129270^2 + 116437^2 .

It is a cyclic number.

It is not a de Polignac number, because 30268307869 - 221 = 30266210717 is a prime.

It is a super-2 number, since 2×302683078692 (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30268307879) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 58887502 + ... + 58888015.

It is an arithmetic number, because the mean of its divisors is an integer number (7596520911).

Almost surely, 230268307869 is an apocalyptic number.

It is an amenable number.

30268307869 is a deficient number, since it is larger than the sum of its proper divisors (117775775).

30268307869 is a wasteful number, since it uses less digits than its factorization.

30268307869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117775774.

The product of its (nonzero) digits is 2612736, while the sum is 52.

The spelling of 30268307869 in words is "thirty billion, two hundred sixty-eight million, three hundred seven thousand, eight hundred sixty-nine".

Divisors: 1 257 117775517 30268307869