678235520 has 32 divisors (see below), whose sum is σ = 1621408320. Its totient is φ = 271293952.

The previous prime is 678235487. The next prime is 678235529. The reversal of 678235520 is 25532876.

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 (678235529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 529232 + ... + 530511.

It is an arithmetic number, because the mean of its divisors is an integer number (50669010).

Almost surely, 2^678235520 is an apocalyptic number.

It is an amenable number.

678235520 is an abundant number, since it is smaller than the sum of its proper divisors (943172800).

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

678235520 is a wasteful number, since it uses less digits than its factorization.

678235520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1059762 (or 1059750 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 38.

The square root of 678235520 is about 26042.9552854510. The cubic root of 678235520 is about 878.6046758017.

The spelling of 678235520 in words is "six hundred seventy-eight million, two hundred thirty-five thousand, five hundred twenty".