87288669 has 18 divisors (see below), whose sum is σ = 136530810. Its totient is φ = 53715168.

The previous prime is 87288647. The next prime is 87288697. The reversal of 87288669 is 96688278.

It can be written as a sum of positive squares in 3 ways, for example, as 1077444 + 86211225 = 1038^2 + 9285^2 .

It is not a de Polignac number, because 87288669 - 2¹¹ = 87286621 is a prime.

It is a super-2 number, since 2×87288669² = 15238623471583122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87288569) 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 17 ways as a sum of consecutive naturals, for example, 27174 + ... + 30215.

It is an arithmetic number, because the mean of its divisors is an integer number (7585045).

Almost surely, 2^87288669 is an apocalyptic number.

It is an amenable number.

87288669 is a deficient number, since it is larger than the sum of its proper divisors (49242141).

87288669 is a wasteful number, since it uses less digits than its factorization.

87288669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57421 (or 57405 counting only the distinct ones).

The product of its digits is 2322432, while the sum is 54.

The square root of 87288669 is about 9342.8405209551. The cubic root of 87288669 is about 443.5943000935.

The spelling of 87288669 in words is "eighty-seven million, two hundred eighty-eight thousand, six hundred sixty-nine".