678750398 has 16 divisors (see below), whose sum is σ = 1078842240. Its totient is φ = 319166976.

The previous prime is 678750389. The next prime is 678750403. The reversal of 678750398 is 893057876.

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, 41990 + ... + 55862.

It is an arithmetic number, because the mean of its divisors is an integer number (67427640).

Almost surely, 2^678750398 is an apocalyptic number.

678750398 is a deficient number, since it is larger than the sum of its proper divisors (400091842).

678750398 is a wasteful number, since it uses less digits than its factorization.

678750398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15331.

The product of its (nonzero) digits is 2540160, while the sum is 53.

The square root of 678750398 is about 26052.8385785503. The cubic root of 678750398 is about 878.8269485377.

The spelling of 678750398 in words is "six hundred seventy-eight million, seven hundred fifty thousand, three hundred ninety-eight".