28308634 has 8 divisors (see below), whose sum is σ = 42536340. Its totient is φ = 14129856.

The previous prime is 28308629. The next prime is 28308649. The reversal of 28308634 is 43680382.

It can be written as a sum of positive squares in 2 ways, for example, as 27092025 + 1216609 = 5205^2 + 1103^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 28308634.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10749 + ... + 13120.

Almost surely, 2^28308634 is an apocalyptic number.

28308634 is a deficient number, since it is larger than the sum of its proper divisors (14227706).

28308634 is a wasteful number, since it uses less digits than its factorization.

28308634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24464.

The product of its (nonzero) digits is 27648, while the sum is 34.

The square root of 28308634 is about 5320.5858699959. The cubic root of 28308634 is about 304.7705306160.

The spelling of 28308634 in words is "twenty-eight million, three hundred eight thousand, six hundred thirty-four".