28329404 has 12 divisors (see below), whose sum is σ = 51286200. Its totient is φ = 13676208.

The previous prime is 28329397. The next prime is 28329419. The reversal of 28329404 is 40492382.

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, 121994 + ... + 122225.

It is an arithmetic number, because the mean of its divisors is an integer number (4273850).

Almost surely, 2^28329404 is an apocalyptic number.

It is an amenable number.

28329404 is a deficient number, since it is larger than the sum of its proper divisors (22956796).

28329404 is a wasteful number, since it uses less digits than its factorization.

28329404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244252 (or 244250 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 28329404 is about 5322.5373648289. The cubic root of 28329404 is about 304.8450489464.

The spelling of 28329404 in words is "twenty-eight million, three hundred twenty-nine thousand, four hundred four".