28378204 has 6 divisors (see below), whose sum is σ = 49661864. Its totient is φ = 14189100.

The previous prime is 28378199. The next prime is 28378247. The reversal of 28378204 is 40287382.

It is a self number, because there is not a number n which added to its sum of digits gives 28378204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3547272 + ... + 3547279.

Almost surely, 2^28378204 is an apocalyptic number.

It is an amenable number.

28378204 is a deficient number, since it is larger than the sum of its proper divisors (21283660).

28378204 is a wasteful number, since it uses less digits than its factorization.

28378204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7094555 (or 7094553 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 34.

The square root of 28378204 is about 5327.1196720179. The cubic root of 28378204 is about 305.0199897317.

It can be divided in two parts, 28378 and 204, that added together give a palindrome (28582).

The spelling of 28378204 in words is "twenty-eight million, three hundred seventy-eight thousand, two hundred four".