28193804 has 6 divisors (see below), whose sum is σ = 49339164. Its totient is φ = 14096900.

The previous prime is 28193761. The next prime is 28193813. The reversal of 28193804 is 40839182.

It is a happy number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 3524222 + ... + 3524229.

It is an arithmetic number, because the mean of its divisors is an integer number (8223194).

Almost surely, 2^28193804 is an apocalyptic number.

It is an amenable number.

28193804 is a deficient number, since it is larger than the sum of its proper divisors (21145360).

28193804 is a wasteful number, since it uses less digits than its factorization.

28193804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7048455 (or 7048453 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 28193804 is about 5309.7837997418. The cubic root of 28193804 is about 304.3578858751.

The spelling of 28193804 in words is "twenty-eight million, one hundred ninety-three thousand, eight hundred four".