678434016 has 48 divisors (see below), whose sum is σ = 1917884304. Its totient is φ = 208748544.

The previous prime is 678433999. The next prime is 678434023. The reversal of 678434016 is 610434876.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 270561 + ... + 273056.

It is an arithmetic number, because the mean of its divisors is an integer number (39955923).

Almost surely, 2^678434016 is an apocalyptic number.

It is an amenable number.

678434016 is an abundant number, since it is smaller than the sum of its proper divisors (1239450288).

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

678434016 is a wasteful number, since it uses less digits than its factorization.

678434016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 543643 (or 543635 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 39.

The square root of 678434016 is about 26046.7659412834. The cubic root of 678434016 is about 878.6903798075.

The spelling of 678434016 in words is "six hundred seventy-eight million, four hundred thirty-four thousand, sixteen".