298978 has 4 divisors (see below), whose sum is σ = 448470. Its totient is φ = 149488.

The previous prime is 298943. The next prime is 298993. The reversal of 298978 is 879892.

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., 288369 + 10609 = 537^2 + 103^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74743 + ... + 74746.

2²⁹⁸⁹⁷⁸ is an apocalyptic number.

298978 is a deficient number, since it is larger than the sum of its proper divisors (149492).

298978 is a wasteful number, since it uses less digits than its factorization.

298978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149491.

The product of its digits is 72576, while the sum is 43.

The square root of 298978 is about 546.7888074934. The cubic root of 298978 is about 66.8671906914.

The spelling of 298978 in words is "two hundred ninety-eight thousand, nine hundred seventy-eight".