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87904230 = 2353779193
BaseRepresentation
bin1010011110101…
…00111111100110
320010101222221020
411033110333212
5140000413410
612420032010
72115113361
oct517247746
9203358836
1087904230
114568a827
1225532606
131529a04b
14b9630d8
157ab5a70
hex53d4fe6

87904230 has 32 divisors (see below), whose sum is σ = 216674784. Its totient is φ = 22807296.

The previous prime is 87904211. The next prime is 87904237. The reversal of 87904230 is 3240978.

It is a junction number, because it is equal to n+sod(n) for n = 87904191 and 87904200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87904237) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 38487 + ... + 40706.

It is an arithmetic number, because the mean of its divisors is an integer number (6771087).

Almost surely, 287904230 is an apocalyptic number.

87904230 is an abundant number, since it is smaller than the sum of its proper divisors (128770554).

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

87904230 is a wasteful number, since it uses less digits than its factorization.

87904230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79240.

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 87904230 is about 9375.7255719224. The cubic root of 87904230 is about 444.6346030490.

The spelling of 87904230 in words is "eighty-seven million, nine hundred four thousand, two hundred thirty".

Divisors: 1 2 3 5 6 10 15 30 37 74 111 185 222 370 555 1110 79193 158386 237579 395965 475158 791930 1187895 2375790 2930141 5860282 8790423 14650705 17580846 29301410 43952115 87904230