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828103145 = 51549106921
BaseRepresentation
bin110001010110111…
…101100111101001
32010201012222221212
4301112331213221
53143443300040
6214101042505
726343521612
oct6126754751
92121188855
10828103145
11395496171
121b13b6435
1310274267c
147bda2c09
154ca78d65
hex315bd9e9

828103145 has 8 divisors (see below), whose sum is σ = 994374600. Its totient is φ = 662048640.

The previous prime is 828103139. The next prime is 828103147. The reversal of 828103145 is 541301828.

It can be written as a sum of positive squares in 4 ways, for example, as 205750336 + 622352809 = 14344^2 + 24947^2 .

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

It is not a de Polignac number, because 828103145 - 28 = 828102889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (828103147) 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, 45716 + ... + 61205.

It is an arithmetic number, because the mean of its divisors is an integer number (124296825).

Almost surely, 2828103145 is an apocalyptic number.

It is an amenable number.

828103145 is a deficient number, since it is larger than the sum of its proper divisors (166271455).

828103145 is a wasteful number, since it uses less digits than its factorization.

828103145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108475.

The product of its (nonzero) digits is 7680, while the sum is 32.

The square root of 828103145 is about 28776.7813523333. The cubic root of 828103145 is about 939.0631774889.

The spelling of 828103145 in words is "eight hundred twenty-eight million, one hundred three thousand, one hundred forty-five".

Divisors: 1 5 1549 7745 106921 534605 165620629 828103145