1928198320278 has 32 divisors (see below), whose sum is σ = 3923006536800. Its totient is φ = 631724025600.

The previous prime is 1928198320277. The next prime is 1928198320313. The reversal of 1928198320278 is 8720238918291.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1928198320273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11529553 + ... + 11695596.

It is an arithmetic number, because the mean of its divisors is an integer number (122593954275).

Almost surely, 2^{1928198320278} is an apocalyptic number.

1928198320278 is an abundant number, since it is smaller than the sum of its proper divisors (1994808216522).

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

1928198320278 is a wasteful number, since it uses less digits than its factorization.

1928198320278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23225392.

The product of its (nonzero) digits is 6967296, while the sum is 60.

The spelling of 1928198320278 in words is "one trillion, nine hundred twenty-eight billion, one hundred ninety-eight million, three hundred twenty thousand, two hundred seventy-eight".