203978 has 8 divisors (see below), whose sum is σ = 310080. Its totient is φ = 100620.

The previous prime is 203977. The next prime is 203989. The reversal of 203978 is 879302.

203978 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 203978.

It is not an unprimeable number, because it can be changed into a prime (203971) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 488 + ... + 803.

It is an arithmetic number, because the mean of its divisors is an integer number (38760).

2²⁰³⁹⁷⁸ is an apocalyptic number.

203978 is a deficient number, since it is larger than the sum of its proper divisors (106102).

203978 is a wasteful number, since it uses less digits than its factorization.

203978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1372.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 203978 is about 451.6392365594. The cubic root of 203978 is about 58.8655369353.

The spelling of 203978 in words is "two hundred three thousand, nine hundred seventy-eight".