678390850 has 24 divisors (see below), whose sum is σ = 1283199120. Its totient is φ = 266755920.

The previous prime is 678390829. The next prime is 678390851. The reversal of 678390850 is 58093876.

It is a self number, because there is not a number n which added to its sum of digits gives 678390850.

It is not an unprimeable number, because it can be changed into a prime (678390851) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 112032 + ... + 117931.

It is an arithmetic number, because the mean of its divisors is an integer number (53466630).

Almost surely, 2^678390850 is an apocalyptic number.

678390850 is a deficient number, since it is larger than the sum of its proper divisors (604808270).

678390850 is a wasteful number, since it uses less digits than its factorization.

678390850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230034 (or 230029 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 46.

The square root of 678390850 is about 26045.9373031573. The cubic root of 678390850 is about 878.6717435793.

The spelling of 678390850 in words is "six hundred seventy-eight million, three hundred ninety thousand, eight hundred fifty".