83688638 has 8 divisors (see below), whose sum is σ = 136945080. Its totient is φ = 38040280.

The previous prime is 83688629. The next prime is 83688641.

83688638 is nontrivially palindromic in base 10.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1901993 + ... + 1902036.

It is an arithmetic number, because the mean of its divisors is an integer number (17118135).

Almost surely, 2^83688638 is an apocalyptic number.

83688638 is a deficient number, since it is larger than the sum of its proper divisors (53256442).

83688638 is a wasteful number, since it uses less digits than its factorization.

83688638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3804042.

The product of its digits is 1327104, while the sum is 50.

The square root of 83688638 is about 9148.1494303493. The cubic root of 83688638 is about 437.4101266275.

The spelling of 83688638 in words is "eighty-three million, six hundred eighty-eight thousand, six hundred thirty-eight".