86636638 has 8 divisors (see below), whose sum is σ = 141769080. Its totient is φ = 39380280.

The previous prime is 86636633. The next prime is 86636639. The reversal of 86636638 is 83663668.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86636633) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1968993 + ... + 1969036.

It is an arithmetic number, because the mean of its divisors is an integer number (17721135).

Almost surely, 2^86636638 is an apocalyptic number.

86636638 is a deficient number, since it is larger than the sum of its proper divisors (55132442).

86636638 is a wasteful number, since it uses less digits than its factorization.

86636638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3938042.

The product of its digits is 746496, while the sum is 46.

The square root of 86636638 is about 9307.8804246724. The cubic root of 86636638 is about 442.4870146317.

The spelling of 86636638 in words is "eighty-six million, six hundred thirty-six thousand, six hundred thirty-eight".