1678466728 has 32 divisors (see below), whose sum is σ = 3301931520. Its totient is φ = 798840000.

The previous prime is 1678466723. The next prime is 1678466731. The reversal of 1678466728 is 8276648761.

It is not an unprimeable number, because it can be changed into a prime (1678466723) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40348 + ... + 70603.

It is an arithmetic number, because the mean of its divisors is an integer number (103185360).

Almost surely, 2^1678466728 is an apocalyptic number.

It is an amenable number.

1678466728 is a deficient number, since it is larger than the sum of its proper divisors (1623464792).

1678466728 is a wasteful number, since it uses less digits than its factorization.

1678466728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111049 (or 111045 counting only the distinct ones).

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

The square root of 1678466728 is about 40969.0947910739. The cubic root of 1678466728 is about 1188.4226277325.

The spelling of 1678466728 in words is "one billion, six hundred seventy-eight million, four hundred sixty-six thousand, seven hundred twenty-eight".