28561634 has 8 divisors (see below), whose sum is σ = 42890988. Its totient is φ = 14264640.

The previous prime is 28561627. The next prime is 28561639. The reversal of 28561634 is 43616582.

It can be written as a sum of positive squares in 2 ways, for example, as 28143025 + 418609 = 5305^2 + 647^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 28561594 and 28561603.

It is not an unprimeable number, because it can be changed into a prime (28561639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5747 + ... + 9494.

Almost surely, 2^28561634 is an apocalyptic number.

28561634 is a deficient number, since it is larger than the sum of its proper divisors (14329354).

28561634 is a wasteful number, since it uses less digits than its factorization.

28561634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16180.

The product of its digits is 34560, while the sum is 35.

The square root of 28561634 is about 5344.3085614511. The cubic root of 28561634 is about 305.6757711776.

The spelling of 28561634 in words is "twenty-eight million, five hundred sixty-one thousand, six hundred thirty-four".