108131728 has 10 divisors (see below), whose sum is σ = 209505254. Its totient is φ = 54065856.

The previous prime is 108131701. The next prime is 108131729. The reversal of 108131728 is 827131801.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 86713344 + 21418384 = 9312^2 + 4628^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 108131728.

It is not an unprimeable number, because it can be changed into a prime (108131729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3379101 + ... + 3379132.

Almost surely, 2^108131728 is an apocalyptic number.

It is an amenable number.

108131728 is a deficient number, since it is larger than the sum of its proper divisors (101373526).

108131728 is an equidigital number, since it uses as much as digits as its factorization.

108131728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6758241 (or 6758235 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 31.

The square root of 108131728 is about 10398.6406803966. The cubic root of 108131728 is about 476.4138528200.

The spelling of 108131728 in words is "one hundred eight million, one hundred thirty-one thousand, seven hundred twenty-eight".