28289134 has 4 divisors (see below), whose sum is σ = 42433704. Its totient is φ = 14144566.

The previous prime is 28289117. The next prime is 28289137. The reversal of 28289134 is 43198282.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 28289093 and 28289102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28289137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7072282 + ... + 7072285.

It is an arithmetic number, because the mean of its divisors is an integer number (10608426).

Almost surely, 2^28289134 is an apocalyptic number.

28289134 is a deficient number, since it is larger than the sum of its proper divisors (14144570).

28289134 is a wasteful number, since it uses less digits than its factorization.

28289134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14144569.

The product of its digits is 27648, while the sum is 37.

The square root of 28289134 is about 5318.7530493528. The cubic root of 28289134 is about 304.7005355931.

The spelling of 28289134 in words is "twenty-eight million, two hundred eighty-nine thousand, one hundred thirty-four".