268978 has 4 divisors (see below), whose sum is σ = 403470. Its totient is φ = 134488.

The previous prime is 268973. The next prime is 268979. The reversal of 268978 is 879862.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 199809 + 69169 = 447^2 + 263^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 268978.

It is not an unprimeable number, because it can be changed into a prime (268973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67243 + ... + 67246.

2²⁶⁸⁹⁷⁸ is an apocalyptic number.

268978 is a deficient number, since it is larger than the sum of its proper divisors (134492).

268978 is a wasteful number, since it uses less digits than its factorization.

268978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134491.

The product of its digits is 48384, while the sum is 40.

The square root of 268978 is about 518.6308899400. The cubic root of 268978 is about 64.5513882482.

The spelling of 268978 in words is "two hundred sixty-eight thousand, nine hundred seventy-eight".