28671634 has 16 divisors (see below), whose sum is σ = 43594200. Its totient is φ = 14141824.

The previous prime is 28671631. The next prime is 28671637. The reversal of 28671634 is 43617682.

It is an interprime number because it is at equal distance from previous prime (28671631) and next prime (28671637).

It can be written as a sum of positive squares in 4 ways, for example, as 15327225 + 13344409 = 3915^2 + 3653^2 .

It is a junction number, because it is equal to n+sod(n) for n = 28671593 and 28671602.

It is not an unprimeable number, because it can be changed into a prime (28671631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73512 + ... + 73900.

Almost surely, 2^28671634 is an apocalyptic number.

28671634 is a deficient number, since it is larger than the sum of its proper divisors (14922566).

28671634 is a wasteful number, since it uses less digits than its factorization.

28671634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 797.

The product of its digits is 48384, while the sum is 37.

The square root of 28671634 is about 5354.5899936410. The cubic root of 28671634 is about 306.0676869077.

The spelling of 28671634 in words is "twenty-eight million, six hundred seventy-one thousand, six hundred thirty-four".