203964 has 24 divisors (see below), whose sum is σ = 497280. Its totient is φ = 64944.

The previous prime is 203953. The next prime is 203969. The reversal of 203964 is 469302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203969) by changing a digit.

203964 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94 + ... + 645.

It is an arithmetic number, because the mean of its divisors is an integer number (20720).

2²⁰³⁹⁶⁴ is an apocalyptic number.

It is an amenable number.

203964 is an abundant number, since it is smaller than the sum of its proper divisors (293316).

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

203964 is a wasteful number, since it uses less digits than its factorization.

203964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 769 (or 767 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 203964 is about 451.6237371972. The cubic root of 203964 is about 58.8641901620.

The spelling of 203964 in words is "two hundred three thousand, nine hundred sixty-four".