203012440 has 32 divisors (see below), whose sum is σ = 459114480. Its totient is φ = 80789632.

The previous prime is 203012423. The next prime is 203012449. The reversal of 203012440 is 44210302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203012449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5002 + ... + 20761.

Almost surely, 2^203012440 is an apocalyptic number.

203012440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

203012440 is an abundant number, since it is smaller than the sum of its proper divisors (256102040).

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

203012440 is a wasteful number, since it uses less digits than its factorization.

203012440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25971 (or 25967 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 203012440 is about 14248.2434005038. The cubic root of 203012440 is about 587.7250708492.

Adding to 203012440 its reverse (44210302), we get a palindrome (247222742).

The spelling of 203012440 in words is "two hundred three million, twelve thousand, four hundred forty".