28320934 has 8 divisors (see below), whose sum is σ = 43063560. Its totient is φ = 13966416.

The previous prime is 28320899. The next prime is 28320953. The reversal of 28320934 is 43902382.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 28320896 and 28320905.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 96844 + ... + 97135.

It is an arithmetic number, because the mean of its divisors is an integer number (5382945).

Almost surely, 2^28320934 is an apocalyptic number.

28320934 is a deficient number, since it is larger than the sum of its proper divisors (14742626).

28320934 is a wasteful number, since it uses less digits than its factorization.

28320934 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194054.

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 28320934 is about 5321.7416322103. The cubic root of 28320934 is about 304.8146647923.

The spelling of 28320934 in words is "twenty-eight million, three hundred twenty thousand, nine hundred thirty-four".