1678919688 has 48 divisors (see below), whose sum is σ = 4549225200. Its totient is φ = 559375200.

The previous prime is 1678919663. The next prime is 1678919689. The reversal of 1678919688 is 8869198761.

It is not an unprimeable number, because it can be changed into a prime (1678919689) 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, 201183 + ... + 209361.

It is an arithmetic number, because the mean of its divisors is an integer number (94775525).

Almost surely, 2^1678919688 is an apocalyptic number.

1678919688 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1678919688 is an abundant number, since it is smaller than the sum of its proper divisors (2870305512).

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

1678919688 is a wasteful number, since it uses less digits than its factorization.

1678919688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11042 (or 11035 counting only the distinct ones).

The product of its digits is 10450944, while the sum is 63.

The square root of 1678919688 is about 40974.6224875837. The cubic root of 1678919688 is about 1188.5295228108.

The spelling of 1678919688 in words is "one billion, six hundred seventy-eight million, nine hundred nineteen thousand, six hundred eighty-eight".