678492012 has 72 divisors (see below), whose sum is σ = 1780787008. Its totient is φ = 200803680.

The previous prime is 678491999. The next prime is 678492037. The reversal of 678492012 is 210294876.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 57003 + ... + 67869.

Almost surely, 2^678492012 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 678492012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (890393504).

678492012 is an abundant number, since it is smaller than the sum of its proper divisors (1102294996).

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

678492012 is a wasteful number, since it uses less digits than its factorization.

678492012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10939 (or 10926 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 39.

The square root of 678492012 is about 26047.8792226930. The cubic root of 678492012 is about 878.7154174059.

The spelling of 678492012 in words is "six hundred seventy-eight million, four hundred ninety-two thousand, twelve".