298378478 has 4 divisors (see below), whose sum is σ = 447567720. Its totient is φ = 149189238.

The previous prime is 298378447. The next prime is 298378523. The reversal of 298378478 is 874873892.

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

It is a super-2 number, since 2×298378478² = 178059432267192968, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74594618 + ... + 74594621.

It is an arithmetic number, because the mean of its divisors is an integer number (111891930).

Almost surely, 2^298378478 is an apocalyptic number.

298378478 is a deficient number, since it is larger than the sum of its proper divisors (149189242).

298378478 is a wasteful number, since it uses less digits than its factorization.

298378478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149189241.

The product of its digits is 5419008, while the sum is 56.

The square root of 298378478 is about 17273.6353440728. The cubic root of 298378478 is about 668.2246590975.

The spelling of 298378478 in words is "two hundred ninety-eight million, three hundred seventy-eight thousand, four hundred seventy-eight".