28324434 has 16 divisors (see below), whose sum is σ = 56837088. Its totient is φ = 9410112.

The previous prime is 28324411. The next prime is 28324507. The reversal of 28324434 is 43442382.

It is a super-2 number, since 2×28324434² = 1604547122840712, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5847 + ... + 9530.

It is an arithmetic number, because the mean of its divisors is an integer number (3552318).

Almost surely, 2^28324434 is an apocalyptic number.

28324434 is an abundant number, since it is smaller than the sum of its proper divisors (28512654).

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

28324434 is a wasteful number, since it uses less digits than its factorization.

28324434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15689.

The product of its digits is 18432, while the sum is 30.

The square root of 28324434 is about 5322.0704617658. The cubic root of 28324434 is about 304.8272209622.

The spelling of 28324434 in words is "twenty-eight million, three hundred twenty-four thousand, four hundred thirty-four".