204278428 has 12 divisors (see below), whose sum is σ = 358709400. Its totient is φ = 101790032.

The previous prime is 204278413. The next prime is 204278453. The reversal of 204278428 is 824872402.

204278428 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×204278428² = 83459352292302368, which contains 22 as substring.

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, 85978 + ... + 88321.

It is an arithmetic number, because the mean of its divisors is an integer number (29892450).

Almost surely, 2^204278428 is an apocalyptic number.

It is an amenable number.

204278428 is a deficient number, since it is larger than the sum of its proper divisors (154430972).

204278428 is a wasteful number, since it uses less digits than its factorization.

204278428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174596 (or 174594 counting only the distinct ones).

The product of its (nonzero) digits is 57344, while the sum is 37.

The square root of 204278428 is about 14292.6004631767. The cubic root of 204278428 is about 588.9442269793.

The spelling of 204278428 in words is "two hundred four million, two hundred seventy-eight thousand, four hundred twenty-eight".