1728878166 has 12 divisors (see below), whose sum is σ = 3745902732. Its totient is φ = 576292716.

The previous prime is 1728878159. The next prime is 1728878183. The reversal of 1728878166 is 6618788271.

It is a happy number.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 48024376 + ... + 48024411.

It is an arithmetic number, because the mean of its divisors is an integer number (312158561).

Almost surely, 2^1728878166 is an apocalyptic number.

1728878166 is an abundant number, since it is smaller than the sum of its proper divisors (2017024566).

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

1728878166 is a wasteful number, since it uses less digits than its factorization.

1728878166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96048795 (or 96048792 counting only the distinct ones).

The product of its digits is 1806336, while the sum is 54.

The square root of 1728878166 is about 41579.7807353526. The cubic root of 1728878166 is about 1200.2032447410.

The spelling of 1728878166 in words is "one billion, seven hundred twenty-eight million, eight hundred seventy-eight thousand, one hundred sixty-six".