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87908488 = 2310988561
BaseRepresentation
bin1010011110101…
…10000010001000
320010102012202221
411033112002020
5140001032423
612420103424
72115131653
oct517260210
9203365687
1087908488
1145692a48
1225534b74
131529bc75
14b96489a
157ab6e5d
hex53d6088

87908488 has 8 divisors (see below), whose sum is σ = 164828430. Its totient is φ = 43954240.

The previous prime is 87908473. The next prime is 87908501. The reversal of 87908488 is 88480978.

It can be written as a sum of positive squares in only one way, i.e., 50722884 + 37185604 = 7122^2 + 6098^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×879084882 = 15455804524892288, which contains 22 as substring.

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 as a sum of consecutive naturals, namely, 5494273 + ... + 5494288.

Almost surely, 287908488 is an apocalyptic number.

It is an amenable number.

87908488 is a deficient number, since it is larger than the sum of its proper divisors (76919942).

87908488 is a wasteful number, since it uses less digits than its factorization.

87908488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10988567 (or 10988563 counting only the distinct ones).

The product of its (nonzero) digits is 1032192, while the sum is 52.

The square root of 87908488 is about 9375.9526449316. The cubic root of 87908488 is about 444.6417821634.

The spelling of 87908488 in words is "eighty-seven million, nine hundred eight thousand, four hundred eighty-eight".

Divisors: 1 2 4 8 10988561 21977122 43954244 87908488