87287290 has 32 divisors (see below), whose sum is σ = 161254800. Its totient is φ = 34005504.

The previous prime is 87287287. The next prime is 87287297. The reversal of 87287290 is 9278278.

It can be written as a sum of positive squares in 8 ways, for example, as 58568409 + 28718881 = 7653^2 + 5359^2 .

It is not an unprimeable number, because it can be changed into a prime (87287297) 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, 82686 + ... + 83734.

Almost surely, 2^87287290 is an apocalyptic number.

87287290 is a deficient number, since it is larger than the sum of its proper divisors (73967510).

87287290 is a wasteful number, since it uses less digits than its factorization.

87287290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1266.

The product of its (nonzero) digits is 112896, while the sum is 43.

The square root of 87287290 is about 9342.7667208381. The cubic root of 87287290 is about 443.5919640905.

The spelling of 87287290 in words is "eighty-seven million, two hundred eighty-seven thousand, two hundred ninety".