978849478 has 4 divisors (see below), whose sum is σ = 1468274220. Its totient is φ = 489424738.

The previous prime is 978849449. The next prime is 978849491. The reversal of 978849478 is 874948879.

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

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, 244712368 + ... + 244712371.

It is an arithmetic number, because the mean of its divisors is an integer number (367068555).

Almost surely, 2^978849478 is an apocalyptic number.

978849478 is a deficient number, since it is larger than the sum of its proper divisors (489424742).

978849478 is a wasteful number, since it uses less digits than its factorization.

978849478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 489424741.

The product of its digits is 32514048, while the sum is 64.

The square root of 978849478 is about 31286.5702498692. The cubic root of 978849478 is about 992.8995286338.

The spelling of 978849478 in words is "nine hundred seventy-eight million, eight hundred forty-nine thousand, four hundred seventy-eight".