678933940 has 48 divisors (see below), whose sum is σ = 1441020672. Its totient is φ = 268684416.

The previous prime is 678933929. The next prime is 678933967. The reversal of 678933940 is 49339876.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1453587 + ... + 1454053.

It is an arithmetic number, because the mean of its divisors is an integer number (30021264).

Almost surely, 2^678933940 is an apocalyptic number.

It is an amenable number.

678933940 is an abundant number, since it is smaller than the sum of its proper divisors (762086732).

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

678933940 is a wasteful number, since it uses less digits than its factorization.

678933940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1096 (or 1094 counting only the distinct ones).

The product of its (nonzero) digits is 979776, while the sum is 49.

The square root of 678933940 is about 26056.3608356961. The cubic root of 678933940 is about 878.9061564072.

The spelling of 678933940 in words is "six hundred seventy-eight million, nine hundred thirty-three thousand, nine hundred forty".