86988638 has 16 divisors (see below), whose sum is σ = 144149760. Its totient is φ = 39039000.

The previous prime is 86988637. The next prime is 86988641. The reversal of 86988638 is 83688968.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86988637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23288 + ... + 26763.

It is an arithmetic number, because the mean of its divisors is an integer number (9009360).

Almost surely, 2^86988638 is an apocalyptic number.

86988638 is a deficient number, since it is larger than the sum of its proper divisors (57161122).

86988638 is a wasteful number, since it uses less digits than its factorization.

86988638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50143.

The product of its digits is 3981312, while the sum is 56.

The square root of 86988638 is about 9326.7699660708. The cubic root of 86988638 is about 443.0854718418.

The spelling of 86988638 in words is "eighty-six million, nine hundred eighty-eight thousand, six hundred thirty-eight".