203290540 has 12 divisors (see below), whose sum is σ = 426910176. Its totient is φ = 81316208.

The previous prime is 203290513. The next prime is 203290547. The reversal of 203290540 is 45092302.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (203290547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5082244 + ... + 5082283.

It is an arithmetic number, because the mean of its divisors is an integer number (35575848).

Almost surely, 2^203290540 is an apocalyptic number.

203290540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

203290540 is an abundant number, since it is smaller than the sum of its proper divisors (223619636).

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

203290540 is a wasteful number, since it uses less digits than its factorization.

203290540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10164536 (or 10164534 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 203290540 is about 14257.9991583672. Note that the first 3 decimals coincide. The cubic root of 203290540 is about 587.9933167519.

The spelling of 203290540 in words is "two hundred three million, two hundred ninety thousand, five hundred forty".