678542508 has 144 divisors (see below), whose sum is σ = 2099062784. Its totient is φ = 187557120.

The previous prime is 678542507. The next prime is 678542581. The reversal of 678542508 is 805245876.

678542508 is a `hidden beast` number, since 67 + 85 + 4 + 2 + 508 = 666.

678542508 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678542507) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 209316 + ... + 212532.

Almost surely, 2^678542508 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 678542508, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1049531392).

678542508 is an abundant number, since it is smaller than the sum of its proper divisors (1420520276).

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

678542508 is a wasteful number, since it uses less digits than its factorization.

678542508 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3274 (or 3260 counting only the distinct ones).

The product of its (nonzero) digits is 537600, while the sum is 45.

The square root of 678542508 is about 26048.8484966226. The cubic root of 678542508 is about 878.7372159985.

The spelling of 678542508 in words is "six hundred seventy-eight million, five hundred forty-two thousand, five hundred eight".