105489128 has 16 divisors (see below), whose sum is σ = 198268260. Its totient is φ = 52617600.

The previous prime is 105489091. The next prime is 105489143. The reversal of 105489128 is 821984501.

It can be written as a sum of positive squares in 2 ways, for example, as 94051204 + 11437924 = 9698^2 + 3382^2 .

It is a super-2 number, since 2×105489128² = 22255912252400768, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 105489091 and 105489100.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12293 + ... + 19028.

Almost surely, 2^105489128 is an apocalyptic number.

It is an amenable number.

105489128 is a deficient number, since it is larger than the sum of its proper divisors (92779132).

105489128 is a wasteful number, since it uses less digits than its factorization.

105489128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31748 (or 31744 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 38.

The square root of 105489128 is about 10270.7900377722. The cubic root of 105489128 is about 472.5008209909.

The spelling of 105489128 in words is "one hundred five million, four hundred eighty-nine thousand, one hundred twenty-eight".