678749248 has 14 divisors (see below), whose sum is σ = 1346893166. Its totient is φ = 339374592.

The previous prime is 678749243. The next prime is 678749273. The reversal of 678749248 is 842947876.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 406103104 + 272646144 = 20152^2 + 16512^2 .

It is not an unprimeable number, because it can be changed into a prime (678749243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5302665 + ... + 5302792.

Almost surely, 2^678749248 is an apocalyptic number.

It is an amenable number.

678749248 is a deficient number, since it is larger than the sum of its proper divisors (668143918).

678749248 is a wasteful number, since it uses less digits than its factorization.

678749248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10605469 (or 10605459 counting only the distinct ones).

The product of its digits is 5419008, while the sum is 55.

The square root of 678749248 is about 26052.8165080093. The cubic root of 678749248 is about 878.8264522082.

The spelling of 678749248 in words is "six hundred seventy-eight million, seven hundred forty-nine thousand, two hundred forty-eight".