1428195768 has 64 divisors (see below), whose sum is σ = 3680847360. Its totient is φ = 461542656.

The previous prime is 1428195767. The next prime is 1428195793. The reversal of 1428195768 is 8675918241.

It is a self number, because there is not a number n which added to its sum of digits gives 1428195768.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1428195767) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 114780 + ... + 126612.

It is an arithmetic number, because the mean of its divisors is an integer number (57513240).

Almost surely, 2^1428195768 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1428195768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1840423680).

1428195768 is an abundant number, since it is smaller than the sum of its proper divisors (2252651592).

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

1428195768 is a wasteful number, since it uses less digits than its factorization.

1428195768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11996 (or 11992 counting only the distinct ones).

The product of its digits is 967680, while the sum is 51.

The square root of 1428195768 is about 37791.4774519335. The cubic root of 1428195768 is about 1126.1491515072.

The spelling of 1428195768 in words is "one billion, four hundred twenty-eight million, one hundred ninety-five thousand, seven hundred sixty-eight".