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87680942 = 2178724533
BaseRepresentation
bin1010011100111…
…10011110101110
320002222122122022
411032132132232
5134421242232
612411150142
72113163366
oct516363656
9202878568
1087680942
1145547a98
1225445352
131521c51b
14b9059a6
157a6e812
hex539e7ae

87680942 has 8 divisors (see below), whose sum is σ = 131600376. Its totient is φ = 43814152.

The previous prime is 87680939. The next prime is 87680977. The reversal of 87680942 is 24908678.

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

It is a junction number, because it is equal to n+sod(n) for n = 87680893 and 87680902.

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, 8693 + ... + 15840.

It is an arithmetic number, because the mean of its divisors is an integer number (16450047).

Almost surely, 287680942 is an apocalyptic number.

87680942 is a deficient number, since it is larger than the sum of its proper divisors (43919434).

87680942 is a wasteful number, since it uses less digits than its factorization.

87680942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26322.

The product of its (nonzero) digits is 193536, while the sum is 44.

The square root of 87680942 is about 9363.8102287477. The cubic root of 87680942 is about 444.2578075573.

It can be divided in two parts, 876 and 80942, that added together give a palindrome (81818).

The spelling of 87680942 in words is "eighty-seven million, six hundred eighty thousand, nine hundred forty-two".

Divisors: 1 2 1787 3574 24533 49066 43840471 87680942