678424448 has 32 divisors (see below), whose sum is σ = 1455517560. Its totient is φ = 313118208.

The previous prime is 678424447. The next prime is 678424451. The reversal of 678424448 is 844424876.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678424447) 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, 202190 + ... + 205517.

Almost surely, 2^678424448 is an apocalyptic number.

It is an amenable number.

678424448 is an abundant number, since it is smaller than the sum of its proper divisors (777093112).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

678424448 is a wasteful number, since it uses less digits than its factorization.

678424448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 407734 (or 407722 counting only the distinct ones).

The product of its digits is 1376256, while the sum is 47.

The square root of 678424448 is about 26046.5822710005. The cubic root of 678424448 is about 878.6862490452.

The spelling of 678424448 in words is "six hundred seventy-eight million, four hundred twenty-four thousand, four hundred forty-eight".