28638546 has 16 divisors (see below), whose sum is σ = 57330624. Its totient is φ = 9537264.

The previous prime is 28638539. The next prime is 28638553. The reversal of 28638546 is 64583682.

It is an interprime number because it is at equal distance from previous prime (28638539) and next prime (28638553).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 28638498 and 28638507.

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, 9360 + ... + 12036.

It is an arithmetic number, because the mean of its divisors is an integer number (3583164).

Almost surely, 2^28638546 is an apocalyptic number.

28638546 is an abundant number, since it is smaller than the sum of its proper divisors (28692078).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28638546 is a wasteful number, since it uses less digits than its factorization.

28638546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4465.

The product of its digits is 276480, while the sum is 42.

The square root of 28638546 is about 5351.4994160515. The cubic root of 28638546 is about 305.9499042260.

The spelling of 28638546 in words is "twenty-eight million, six hundred thirty-eight thousand, five hundred forty-six".