678071950 has 12 divisors (see below), whose sum is σ = 1261213920. Its totient is φ = 271228760.

The previous prime is 678071941. The next prime is 678071957. The reversal of 678071950 is 59170876.

It is a junction number, because it is equal to n+sod(n) for n = 678071897 and 678071906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678071957) 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, 6780670 + ... + 6780769.

It is an arithmetic number, because the mean of its divisors is an integer number (105101160).

Almost surely, 2^678071950 is an apocalyptic number.

678071950 is a deficient number, since it is larger than the sum of its proper divisors (583141970).

678071950 is a wasteful number, since it uses less digits than its factorization.

678071950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13561451 (or 13561446 counting only the distinct ones).

The product of its (nonzero) digits is 105840, while the sum is 43.

The square root of 678071950 is about 26039.8147074821. The cubic root of 678071950 is about 878.5340391190.

The spelling of 678071950 in words is "six hundred seventy-eight million, seventy-one thousand, nine hundred fifty".