28047134 has 4 divisors (see below), whose sum is σ = 42070704. Its totient is φ = 14023566.

The previous prime is 28047119. The next prime is 28047139. The reversal of 28047134 is 43174082.

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

It is a super-2 number, since 2×28047134² = 1573283451227912, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28047097 and 28047106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28047139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7011782 + ... + 7011785.

It is an arithmetic number, because the mean of its divisors is an integer number (10517676).

Almost surely, 2^28047134 is an apocalyptic number.

28047134 is a deficient number, since it is larger than the sum of its proper divisors (14023570).

28047134 is a wasteful number, since it uses less digits than its factorization.

28047134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14023569.

The product of its (nonzero) digits is 5376, while the sum is 29.

The square root of 28047134 is about 5295.9544937622. The cubic root of 28047134 is about 303.8291904597.

The spelling of 28047134 in words is "twenty-eight million, forty-seven thousand, one hundred thirty-four".