86638887 has 6 divisors (see below), whose sum is σ = 125145072. Its totient is φ = 57759252.

The previous prime is 86638883. The next prime is 86638889. The reversal of 86638887 is 78883668.

It is a happy number.

It is not a de Polignac number, because 86638887 - 2² = 86638883 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86638883) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4813263 + ... + 4813280.

It is an arithmetic number, because the mean of its divisors is an integer number (20857512).

Almost surely, 2^86638887 is an apocalyptic number.

86638887 is a deficient number, since it is larger than the sum of its proper divisors (38506185).

86638887 is a wasteful number, since it uses less digits than its factorization.

86638887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9626549 (or 9626546 counting only the distinct ones).

The product of its digits is 3096576, while the sum is 54.

The square root of 86638887 is about 9308.0012354963. The cubic root of 86638887 is about 442.4908434378.

The spelling of 86638887 in words is "eighty-six million, six hundred thirty-eight thousand, eight hundred eighty-seven".