28146628 has 24 divisors (see below), whose sum is σ = 52792992. Its totient is φ = 13083264.

The previous prime is 28146593. The next prime is 28146647. The reversal of 28146628 is 82664182.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3151 + ... + 8137.

It is an arithmetic number, because the mean of its divisors is an integer number (2199708).

Almost surely, 2^28146628 is an apocalyptic number.

It is an amenable number.

28146628 is a deficient number, since it is larger than the sum of its proper divisors (24646364).

28146628 is a wasteful number, since it uses less digits than its factorization.

28146628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5091 (or 5089 counting only the distinct ones).

The product of its digits is 36864, while the sum is 37.

The square root of 28146628 is about 5305.3395744288. The cubic root of 28146628 is about 304.1880329104.

The spelling of 28146628 in words is "twenty-eight million, one hundred forty-six thousand, six hundred twenty-eight".