203540864 has 64 divisors (see below), whose sum is σ = 434581200. Its totient is φ = 94617600.

The previous prime is 203540861. The next prime is 203540867. The reversal of 203540864 is 468045302.

It is an interprime number because it is at equal distance from previous prime (203540861) and next prime (203540867).

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a self number, because there is not a number n which added to its sum of digits gives 203540864.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203540861) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 193139 + ... + 194189.

Almost surely, 2^203540864 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 203540864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (217290600).

203540864 is an abundant number, since it is smaller than the sum of its proper divisors (231040336).

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

203540864 is a wasteful number, since it uses less digits than its factorization.

203540864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1171 (or 1159 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 32.

The square root of 203540864 is about 14266.7748282504. The cubic root of 203540864 is about 588.2345617309.

The spelling of 203540864 in words is "two hundred three million, five hundred forty thousand, eight hundred sixty-four".