678400072 has 16 divisors (see below), whose sum is σ = 1453714560. Its totient is φ = 290742864.

The previous prime is 678400067. The next prime is 678400109. The reversal of 678400072 is 270004876.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6057088 + ... + 6057199.

It is an arithmetic number, because the mean of its divisors is an integer number (90857160).

Almost surely, 2^678400072 is an apocalyptic number.

It is an amenable number.

678400072 is an abundant number, since it is smaller than the sum of its proper divisors (775314488).

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

678400072 is a wasteful number, since it uses less digits than its factorization.

678400072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12114300 (or 12114296 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 34.

The square root of 678400072 is about 26046.1143359235. The cubic root of 678400072 is about 878.6757250963.

The spelling of 678400072 in words is "six hundred seventy-eight million, four hundred thousand, seventy-two".