86587780 has 12 divisors (see below), whose sum is σ = 181834380. Its totient is φ = 34635104.

The previous prime is 86587763. The next prime is 86587799. The reversal of 86587780 is 8778568.

It can be written as a sum of positive squares in 2 ways, for example, as 38340864 + 48246916 = 6192^2 + 6946^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2164675 + ... + 2164714.

It is an arithmetic number, because the mean of its divisors is an integer number (15152865).

Almost surely, 2^86587780 is an apocalyptic number.

It is an amenable number.

86587780 is an abundant number, since it is smaller than the sum of its proper divisors (95246600).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

86587780 is a wasteful number, since it uses less digits than its factorization.

86587780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4329398 (or 4329396 counting only the distinct ones).

The product of its (nonzero) digits is 752640, while the sum is 49.

The square root of 86587780 is about 9305.2555042836. The cubic root of 86587780 is about 442.4038200530.

The spelling of 86587780 in words is "eighty-six million, five hundred eighty-seven thousand, seven hundred eighty".