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87881608 = 2310985201
BaseRepresentation
bin1010011110011…
…11011110001000
320010100211220101
411033033132020
5134444202413
612415335144
72114660413
oct517173610
9203324811
1087881608
1145674831
12255214b4
131528c969
14b958b7a
hex53cf788

87881608 has 8 divisors (see below), whose sum is σ = 164778030. Its totient is φ = 43940800.

The previous prime is 87881603. The next prime is 87881609. The reversal of 87881608 is 80618878.

It can be written as a sum of positive squares in only one way, i.e., 83137924 + 4743684 = 9118^2 + 2178^2 .

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

It is not an unprimeable number, because it can be changed into a prime (87881603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5492593 + ... + 5492608.

Almost surely, 287881608 is an apocalyptic number.

It is an amenable number.

87881608 is a deficient number, since it is larger than the sum of its proper divisors (76896422).

87881608 is a wasteful number, since it uses less digits than its factorization.

87881608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10985207 (or 10985203 counting only the distinct ones).

The product of its (nonzero) digits is 172032, while the sum is 46.

The square root of 87881608 is about 9374.5190809982. The cubic root of 87881608 is about 444.5964577972.

The spelling of 87881608 in words is "eighty-seven million, eight hundred eighty-one thousand, six hundred eight".

Divisors: 1 2 4 8 10985201 21970402 43940804 87881608