203138328 has 32 divisors (see below), whose sum is σ = 508984560. Its totient is φ = 67560960.

The previous prime is 203138303. The next prime is 203138333. The reversal of 203138328 is 823831302.

It is a junction number, because it is equal to n+sod(n) for n = 203138295 and 203138304.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1708 + ... + 20228.

Almost surely, 2^203138328 is an apocalyptic number.

It is an amenable number.

203138328 is an abundant number, since it is smaller than the sum of its proper divisors (305846232).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

203138328 is a wasteful number, since it uses less digits than its factorization.

203138328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18987 (or 18983 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 203138328 is about 14252.6603832407. The cubic root of 203138328 is about 587.8465285059.

The spelling of 203138328 in words is "two hundred three million, one hundred thirty-eight thousand, three hundred twenty-eight".