678047398 has 12 divisors (see below), whose sum is σ = 1183123692. Its totient is φ = 290591700.

The previous prime is 678047389. The next prime is 678047399. The reversal of 678047398 is 893740876.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678047399) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3459328 + ... + 3459523.

It is an arithmetic number, because the mean of its divisors is an integer number (98593641).

Almost surely, 2^678047398 is an apocalyptic number.

678047398 is a deficient number, since it is larger than the sum of its proper divisors (505076294).

678047398 is a wasteful number, since it uses less digits than its factorization.

678047398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6918867 (or 6918860 counting only the distinct ones).

The product of its (nonzero) digits is 2032128, while the sum is 52.

The square root of 678047398 is about 26039.3432712885. The cubic root of 678047398 is about 878.5234355107.

The spelling of 678047398 in words is "six hundred seventy-eight million, forty-seven thousand, three hundred ninety-eight".