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687132152 = 23712270217
BaseRepresentation
bin101000111101001…
…100110111111000
31202212221221002222
4220331030313320
52401401212102
6152103343212
723012345510
oct5075146770
91685857088
10687132152
11322960613
12172151b08
13ac485395
1467388840
15404ceaa2
hex28f4cdf8

687132152 has 16 divisors (see below), whose sum is σ = 1472426160. Its totient is φ = 294485184.

The previous prime is 687132097. The next prime is 687132167. The reversal of 687132152 is 251231786.

It is a happy number.

It is a super-2 number, since 2×6871321522 = 944301188624302208, which contains 22 as substring.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

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, 6135053 + ... + 6135164.

It is an arithmetic number, because the mean of its divisors is an integer number (92026635).

Almost surely, 2687132152 is an apocalyptic number.

It is an amenable number.

687132152 is an abundant number, since it is smaller than the sum of its proper divisors (785294008).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

687132152 is a wasteful number, since it uses less digits than its factorization.

687132152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12270230 (or 12270226 counting only the distinct ones).

The product of its digits is 20160, while the sum is 35.

The square root of 687132152 is about 26213.2056795807. The cubic root of 687132152 is about 882.4296458612.

The spelling of 687132152 in words is "six hundred eighty-seven million, one hundred thirty-two thousand, one hundred fifty-two".

Divisors: 1 2 4 7 8 14 28 56 12270217 24540434 49080868 85891519 98161736 171783038 343566076 687132152