203420440 has 32 divisors (see below), whose sum is σ = 459542160. Its totient is φ = 81040000.

The previous prime is 203420423. The next prime is 203420461. The reversal of 203420440 is 44024302.

It is a zygodrome in base 2.

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, 91 + ... + 20170.

Almost surely, 2^203420440 is an apocalyptic number.

203420440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

203420440 is an abundant number, since it is smaller than the sum of its proper divisors (256121720).

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

203420440 is a wasteful number, since it uses less digits than its factorization.

203420440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20523 (or 20519 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 19.

The square root of 203420440 is about 14262.5537685227. The cubic root of 203420440 is about 588.1185301024.

Adding to 203420440 its reverse (44024302), we get a palindrome (247444742).

The spelling of 203420440 in words is "two hundred three million, four hundred twenty thousand, four hundred forty".