28642834 has 16 divisors (see below), whose sum is σ = 47869056. Its totient is φ = 12742000.

The previous prime is 28642829. The next prime is 28642837. The reversal of 28642834 is 43824682.

It is a junction number, because it is equal to n+sod(n) for n = 28642793 and 28642802.

It is not an unprimeable number, because it can be changed into a prime (28642837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12817 + ... + 14884.

It is an arithmetic number, because the mean of its divisors is an integer number (2991816).

Almost surely, 2^28642834 is an apocalyptic number.

28642834 is a deficient number, since it is larger than the sum of its proper divisors (19226222).

28642834 is a wasteful number, since it uses less digits than its factorization.

28642834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27761.

The product of its digits is 73728, while the sum is 37.

The square root of 28642834 is about 5351.9000364357. The cubic root of 28642834 is about 305.9651732475.

The spelling of 28642834 in words is "twenty-eight million, six hundred forty-two thousand, eight hundred thirty-four".