108639898 has 8 divisors (see below), whose sum is σ = 164132640. Its totient is φ = 53929020.

The previous prime is 108639863. The next prime is 108639899. The reversal of 108639898 is 898936801.

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

It is not an unprimeable number, because it can be changed into a prime (108639899) 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, 195118 + ... + 195673.

It is an arithmetic number, because the mean of its divisors is an integer number (20516580).

Almost surely, 2^108639898 is an apocalyptic number.

108639898 is a deficient number, since it is larger than the sum of its proper divisors (55492742).

108639898 is a wasteful number, since it uses less digits than its factorization.

108639898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390932.

The product of its (nonzero) digits is 746496, while the sum is 52.

The square root of 108639898 is about 10423.0464836342. The cubic root of 108639898 is about 477.1589963192.

The spelling of 108639898 in words is "one hundred eight million, six hundred thirty-nine thousand, eight hundred ninety-eight".