86786645 has 24 divisors (see below), whose sum is σ = 117596472. Its totient is φ = 61395840.

The previous prime is 86786633. The next prime is 86786653. The reversal of 86786645 is 54668768.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 14485636 + 72301009 = 3806^2 + 8503^2 .

It is not a de Polignac number, because 86786645 - 2²⁰ = 85738069 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 86786593 and 86786602.

It is a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 20447 + ... + 24323.

It is an arithmetic number, because the mean of its divisors is an integer number (4899853).

Almost surely, 2^86786645 is an apocalyptic number.

It is an amenable number.

86786645 is a deficient number, since it is larger than the sum of its proper divisors (30809827).

86786645 is a wasteful number, since it uses less digits than its factorization.

86786645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3941 (or 3930 counting only the distinct ones).

The product of its digits is 1935360, while the sum is 50.

The square root of 86786645 is about 9315.9350040670. The cubic root of 86786645 is about 442.7422487487.

The spelling of 86786645 in words is "eighty-six million, seven hundred eighty-six thousand, six hundred forty-five".