28146128 has 10 divisors (see below), whose sum is σ = 54533154. Its totient is φ = 14073056.

The previous prime is 28146119. The next prime is 28146179. The reversal of 28146128 is 82164182.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 27962944 + 183184 = 5288^2 + 428^2 .

It is a junction number, because it is equal to n+sod(n) for n = 28146094 and 28146103.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 879551 + ... + 879582.

Almost surely, 2^28146128 is an apocalyptic number.

It is an amenable number.

28146128 is a deficient number, since it is larger than the sum of its proper divisors (26387026).

28146128 is a wasteful number, since it uses less digits than its factorization.

28146128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1759141 (or 1759135 counting only the distinct ones).

The product of its digits is 6144, while the sum is 32.

The square root of 28146128 is about 5305.2924518824. The cubic root of 28146128 is about 304.1862316891.

The spelling of 28146128 in words is "twenty-eight million, one hundred forty-six thousand, one hundred twenty-eight".