203438928 has 160 divisors (see below), whose sum is σ = 689955840. Its totient is φ = 50042880.

The previous prime is 203438897. The next prime is 203438941. The reversal of 203438928 is 829834302.

203438928 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 68776 + ... + 71672.

It is an arithmetic number, because the mean of its divisors is an integer number (4312224).

Almost surely, 2^203438928 is an apocalyptic number.

203438928 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 203438928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (344977920).

203438928 is an abundant number, since it is smaller than the sum of its proper divisors (486516912).

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

203438928 is a wasteful number, since it uses less digits than its factorization.

203438928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2945 (or 2939 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 39.

The square root of 203438928 is about 14263.2018845700. The cubic root of 203438928 is about 588.1363467420.

The spelling of 203438928 in words is "two hundred three million, four hundred thirty-eight thousand, nine hundred twenty-eight".