203426720 has 192 divisors, whose sum is σ = 587865600. Its totient is φ = 65015808.

The previous prime is 203426693. The next prime is 203426723. The reversal of 203426720 is 27624302.

It is a self number, because there is not a number n which added to its sum of digits gives 203426720.

It is not an unprimeable number, because it can be changed into a prime (203426723) 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, 1365206 + ... + 1365354.

It is an arithmetic number, because the mean of its divisors is an integer number (3061800).

Almost surely, 2^203426720 is an apocalyptic number.

203426720 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 203426720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (293932800).

203426720 is an abundant number, since it is smaller than the sum of its proper divisors (384438880).

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

203426720 is a wasteful number, since it uses less digits than its factorization.

203426720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247 (or 239 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 26.

The square root of 203426720 is about 14262.7739237499. The cubic root of 203426720 is about 588.1245821759.

The spelling of 203426720 in words is "two hundred three million, four hundred twenty-six thousand, seven hundred twenty".