203806428 has 24 divisors (see below), whose sum is σ = 543484032. Its totient is φ = 58230384.

The previous prime is 203806411. The next prime is 203806433. The reversal of 203806428 is 824608302.

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, 1213050 + ... + 1213217.

It is an arithmetic number, because the mean of its divisors is an integer number (22645168).

Almost surely, 2^203806428 is an apocalyptic number.

203806428 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

203806428 is an abundant number, since it is smaller than the sum of its proper divisors (339677604).

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

203806428 is a wasteful number, since it uses less digits than its factorization.

203806428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2426281 (or 2426279 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 33.

The square root of 203806428 is about 14276.0788734162. The cubic root of 203806428 is about 588.4902778407.

The spelling of 203806428 in words is "two hundred three million, eight hundred six thousand, four hundred twenty-eight".