87005765 has 16 divisors (see below), whose sum is σ = 130170240. Its totient is φ = 54237120.

The previous prime is 87005761. The next prime is 87005767. The reversal of 87005765 is 56750078.

It is not a de Polignac number, because 87005765 - 2² = 87005761 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87005761) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 112610 + ... + 113379.

It is an arithmetic number, because the mean of its divisors is an integer number (8135640).

Almost surely, 2^87005765 is an apocalyptic number.

It is an amenable number.

87005765 is a deficient number, since it is larger than the sum of its proper divisors (43164475).

87005765 is a wasteful number, since it uses less digits than its factorization.

87005765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226012.

The product of its (nonzero) digits is 58800, while the sum is 38.

The square root of 87005765 is about 9327.6880844076. The cubic root of 87005765 is about 443.1145493055.

The spelling of 87005765 in words is "eighty-seven million, five thousand, seven hundred sixty-five".