87805011 has 48 divisors (see below), whose sum is σ = 144460800. Its totient is φ = 47218752.

The previous prime is 87805009. The next prime is 87805019. The reversal of 87805011 is 11050878.

It is not a de Polignac number, because 87805011 - 2¹ = 87805009 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 87805011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87805019) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 183070 + ... + 183548.

It is an arithmetic number, because the mean of its divisors is an integer number (3009600).

Almost surely, 2^87805011 is an apocalyptic number.

87805011 is a deficient number, since it is larger than the sum of its proper divisors (56655789).

87805011 is a wasteful number, since it uses less digits than its factorization.

87805011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 568 (or 561 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 30.

The square root of 87805011 is about 9370.4328075068. The cubic root of 87805011 is about 444.4672511884.

Adding to 87805011 its reverse (11050878), we get a palindrome (98855889).

The spelling of 87805011 in words is "eighty-seven million, eight hundred five thousand, eleven".