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688361542 = 21137845653
BaseRepresentation
bin101001000001111…
…001000001000110
31202222021101111221
4221001321001012
52402210032132
6152145550554
723025655651
oct5101710106
91688241457
10688361542
11323620240
1217264545a
13ac7c5b2b
14675c8898
1540673e97
hex29079046

688361542 has 16 divisors (see below), whose sum is σ = 1156854672. Its totient is φ = 304434720.

The previous prime is 688361519. The next prime is 688361573. The reversal of 688361542 is 245163886.

It is a super-2 number, since 2×6883615422 = 947683225009235528, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 422013 + ... + 423640.

It is an arithmetic number, because the mean of its divisors is an integer number (72303417).

Almost surely, 2688361542 is an apocalyptic number.

688361542 is a deficient number, since it is larger than the sum of its proper divisors (468493130).

688361542 is a wasteful number, since it uses less digits than its factorization.

688361542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 845703.

The product of its digits is 276480, while the sum is 43.

The square root of 688361542 is about 26236.6450218011. The cubic root of 688361542 is about 882.9556018611.

The spelling of 688361542 in words is "six hundred eighty-eight million, three hundred sixty-one thousand, five hundred forty-two".

Divisors: 1 2 11 22 37 74 407 814 845653 1691306 9302183 18604366 31289161 62578322 344180771 688361542