28243634 has 8 divisors (see below), whose sum is σ = 42610860. Its totient is φ = 14040016.

The previous prime is 28243603. The next prime is 28243643. The reversal of 28243634 is 43634282.

It can be written as a sum of positive squares in 2 ways, for example, as 24255625 + 3988009 = 4925^2 + 1997^2 .

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 28243634.

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, 40469 + ... + 41160.

Almost surely, 2^28243634 is an apocalyptic number.

28243634 is a deficient number, since it is larger than the sum of its proper divisors (14367226).

28243634 is a wasteful number, since it uses less digits than its factorization.

28243634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81804.

The product of its digits is 27648, while the sum is 32.

The square root of 28243634 is about 5314.4740097210. The cubic root of 28243634 is about 304.5370886919.

The spelling of 28243634 in words is "twenty-eight million, two hundred forty-three thousand, six hundred thirty-four".