1928787878792 has 32 divisors (see below), whose sum is σ = 3734709496320. Its totient is φ = 932891541120.

The previous prime is 1928787878749. The next prime is 1928787878813. The reversal of 1928787878792 is 2978787878291.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1928787878792.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1046468 + ... + 2225459.

It is an arithmetic number, because the mean of its divisors is an integer number (116709671760).

Almost surely, 2^{1928787878792} is an apocalyptic number.

It is an amenable number.

1928787878792 is a deficient number, since it is larger than the sum of its proper divisors (1805921617528).

1928787878792 is a wasteful number, since it uses less digits than its factorization.

1928787878792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3274341 (or 3274337 counting only the distinct ones).

The product of its digits is 3186376704, while the sum is 83.

The spelling of 1928787878792 in words is "one trillion, nine hundred twenty-eight billion, seven hundred eighty-seven million, eight hundred seventy-eight thousand, seven hundred ninety-two".