28078203 has 8 divisors (see below), whose sum is σ = 39639888. Its totient is φ = 17617664.

The previous prime is 28078189. The next prime is 28078229. The reversal of 28078203 is 30287082.

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

It is a cyclic number.

It is not a de Polignac number, because 28078203 - 2⁸ = 28077947 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28078243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 275226 + ... + 275327.

It is an arithmetic number, because the mean of its divisors is an integer number (4954986).

Almost surely, 2^28078203 is an apocalyptic number.

28078203 is a deficient number, since it is larger than the sum of its proper divisors (11561685).

28078203 is a wasteful number, since it uses less digits than its factorization.

28078203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 550573.

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 28078203 is about 5298.8869585980. The cubic root of 28078203 is about 303.9413372205.

It can be divided in two parts, 2807820 and 3, that multiplied together give a triangular number (8423460 = T₄₁₀₄).

The spelling of 28078203 in words is "twenty-eight million, seventy-eight thousand, two hundred three".