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810750057 = 31385324371
BaseRepresentation
bin110000010100110…
…001000001101001
32002111120100222220
4300110301001221
53130023000212
6212241104253
726043155535
oct6024610151
92074510886
10810750057
11386713577
121a7628089
13cbc77c80
1479966bc5
154b29c38c
hex30531069

810750057 has 16 divisors (see below), whose sum is σ = 1165566528. Its totient is φ = 498317760.

The previous prime is 810749999. The next prime is 810750091. The reversal of 810750057 is 750057018.

It is not a de Polignac number, because 810750057 - 218 = 810487913 is a prime.

It is not an unprimeable number, because it can be changed into a prime (810700057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21082 + ... + 45452.

It is an arithmetic number, because the mean of its divisors is an integer number (72847908).

Almost surely, 2810750057 is an apocalyptic number.

It is an amenable number.

810750057 is a deficient number, since it is larger than the sum of its proper divisors (354816471).

810750057 is a wasteful number, since it uses less digits than its factorization.

810750057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25240.

The product of its (nonzero) digits is 9800, while the sum is 33.

The square root of 810750057 is about 28473.6730507323. The cubic root of 810750057 is about 932.4573915992.

The spelling of 810750057 in words is "eight hundred ten million, seven hundred fifty thousand, fifty-seven".

Divisors: 1 3 13 39 853 2559 11089 24371 33267 73113 316823 950469 20788463 62365389 270250019 810750057