203320040 has 128 divisors (see below), whose sum is σ = 574801920. Its totient is φ = 62880000.

The previous prime is 203320021. The next prime is 203320049. The reversal of 203320040 is 40023302.

203320040 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 203319997 and 203320024.

It is not an unprimeable number, because it can be changed into a prime (203320049) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 772949 + ... + 773211.

It is an arithmetic number, because the mean of its divisors is an integer number (4490640).

Almost surely, 2^203320040 is an apocalyptic number.

203320040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 203320040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (287400960).

203320040 is an abundant number, since it is smaller than the sum of its proper divisors (371481880).

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

203320040 is a wasteful number, since it uses less digits than its factorization.

203320040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 543 (or 539 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 14.

The square root of 203320040 is about 14259.0336278445. The cubic root of 203320040 is about 588.0217571044.

Adding to 203320040 its reverse (40023302), we get a palindrome (243343342).

The spelling of 203320040 in words is "two hundred three million, three hundred twenty thousand, forty".