1678623808 has 14 divisors (see below), whose sum is σ = 3331019246. Its totient is φ = 839311872.

The previous prime is 1678623787. The next prime is 1678623827. The reversal of 1678623808 is 8083268761.

It can be written as a sum of positive squares in only one way, i.e., 1677066304 + 1557504 = 40952^2 + 1248^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13114185 + ... + 13114312.

Almost surely, 2^1678623808 is an apocalyptic number.

It is an amenable number.

1678623808 is a deficient number, since it is larger than the sum of its proper divisors (1652395438).

1678623808 is an equidigital number, since it uses as much as digits as its factorization.

1678623808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26228509 (or 26228499 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 49.

The square root of 1678623808 is about 40971.0118010283. The cubic root of 1678623808 is about 1188.4596995831.

The spelling of 1678623808 in words is "one billion, six hundred seventy-eight million, six hundred twenty-three thousand, eight hundred eight".