1428895978792 has 8 divisors (see below), whose sum is σ = 2679179960250. Its totient is φ = 714447989392.

The previous prime is 1428895978723. The next prime is 1428895978793. The reversal of 1428895978792 is 2978795988241.

It can be written as a sum of positive squares in only one way, i.e., 918365722596 + 510530256196 = 958314^2 + 714514^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (1428895978793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 89305998667 + ... + 89305998682.

Almost surely, 2^{1428895978792} is an apocalyptic number.

It is an amenable number.

1428895978792 is a deficient number, since it is larger than the sum of its proper divisors (1250283981458).

1428895978792 is a wasteful number, since it uses less digits than its factorization.

1428895978792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178611997355 (or 178611997351 counting only the distinct ones).

The product of its digits is 1463132160, while the sum is 79.

The spelling of 1428895978792 in words is "one trillion, four hundred twenty-eight billion, eight hundred ninety-five million, nine hundred seventy-eight thousand, seven hundred ninety-two".