28539434 has 32 divisors (see below), whose sum is σ = 54521856. Its totient is φ = 10879920.

The previous prime is 28539431. The next prime is 28539449. The reversal of 28539434 is 43493582.

It is not an unprimeable number, because it can be changed into a prime (28539431) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5267 + ... + 9209.

It is an arithmetic number, because the mean of its divisors is an integer number (1703808).

Almost surely, 2^28539434 is an apocalyptic number.

28539434 is a deficient number, since it is larger than the sum of its proper divisors (25982422).

28539434 is a wasteful number, since it uses less digits than its factorization.

28539434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4010.

The product of its digits is 103680, while the sum is 38.

The square root of 28539434 is about 5342.2311818191. The cubic root of 28539434 is about 305.5965534753.

The spelling of 28539434 in words is "twenty-eight million, five hundred thirty-nine thousand, four hundred thirty-four".