203405930 has 64 divisors (see below), whose sum is σ = 455051520. Its totient is φ = 63742464.

The previous prime is 203405921. The next prime is 203405941. The reversal of 203405930 is 39504302.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a self number, because there is not a number n which added to its sum of digits gives 203405930.

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, 96326 + ... + 98414.

It is an arithmetic number, because the mean of its divisors is an integer number (7110180).

Almost surely, 2^203405930 is an apocalyptic number.

203405930 is an abundant number, since it is smaller than the sum of its proper divisors (251645590).

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

203405930 is a wasteful number, since it uses less digits than its factorization.

203405930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2223.

The product of its (nonzero) digits is 3240, while the sum is 26.

The square root of 203405930 is about 14262.0450847696. The cubic root of 203405930 is about 588.1045462524.

The spelling of 203405930 in words is "two hundred three million, four hundred five thousand, nine hundred thirty".