28449834 has 32 divisors (see below), whose sum is σ = 65218560. Its totient is φ = 8104752.

The previous prime is 28449833. The next prime is 28449871. The reversal of 28449834 is 43894482.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (28449833) 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 15 ways as a sum of consecutive naturals, for example, 17667 + ... + 19209.

It is an arithmetic number, because the mean of its divisors is an integer number (2038080).

Almost surely, 2^28449834 is an apocalyptic number.

28449834 is an abundant number, since it is smaller than the sum of its proper divisors (36768726).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28449834 is a wasteful number, since it uses less digits than its factorization.

28449834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1994.

The product of its digits is 221184, while the sum is 42.

The square root of 28449834 is about 5333.8385802347. The cubic root of 28449834 is about 305.2764098206.

The spelling of 28449834 in words is "twenty-eight million, four hundred forty-nine thousand, eight hundred thirty-four".