1028796389761 has 48 divisors (see below), whose sum is σ = 1225614562704. Its totient is φ = 860749134336.

The previous prime is 1028796389749. The next prime is 1028796389767. The reversal of 1028796389761 is 1679836978201.

It can be written as a sum of positive squares in 8 ways, for example, as 586878566400 + 441917823361 = 766080^2 + 664769^2 .

It is not a de Polignac number, because 1028796389761 - 2⁵ = 1028796389729 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1028796389767) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 831686035 + ... + 831687271.

It is an arithmetic number, because the mean of its divisors is an integer number (25533636723).

Almost surely, 2^{1028796389761} is an apocalyptic number.

It is an amenable number.

1028796389761 is a deficient number, since it is larger than the sum of its proper divisors (196818172943).

1028796389761 is a wasteful number, since it uses less digits than its factorization.

1028796389761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2690 (or 2683 counting only the distinct ones).

The product of its (nonzero) digits is 54867456, while the sum is 67.

The spelling of 1028796389761 in words is "one trillion, twenty-eight billion, seven hundred ninety-six million, three hundred eighty-nine thousand, seven hundred sixty-one".