203401320 has 64 divisors (see below), whose sum is σ = 620568000. Its totient is φ = 53319168.

The previous prime is 203401313. The next prime is 203401339. The reversal of 203401320 is 23104302.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 203401320.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 7285 + ... + 21444.

It is an arithmetic number, because the mean of its divisors is an integer number (9696375).

Almost surely, 2^203401320 is an apocalyptic number.

203401320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

203401320 is an abundant number, since it is smaller than the sum of its proper divisors (417166680).

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

203401320 is a wasteful number, since it uses less digits than its factorization.

203401320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28802 (or 28798 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 203401320 is about 14261.8834660784. The cubic root of 203401320 is about 588.1001032773.

Adding to 203401320 its reverse (23104302), we get a palindrome (226505622).

The spelling of 203401320 in words is "two hundred three million, four hundred one thousand, three hundred twenty".