1028229435781 has 8 divisors (see below), whose sum is σ = 1028915727840. Its totient is φ = 1027543246128.

The previous prime is 1028229435773. The next prime is 1028229435791. The reversal of 1028229435781 is 1875349228201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1028229435781 - 2³ = 1028229435773 is a prime.

It is a super-2 number, since 2×1028229435781² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1028229435791) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36673090 + ... + 36701116.

It is an arithmetic number, because the mean of its divisors is an integer number (128614465980).

Almost surely, 2^{1028229435781} is an apocalyptic number.

It is an amenable number.

1028229435781 is a deficient number, since it is larger than the sum of its proper divisors (686292059).

1028229435781 is a wasteful number, since it uses less digits than its factorization.

1028229435781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51203.

The product of its (nonzero) digits is 1935360, while the sum is 52.

The spelling of 1028229435781 in words is "one trillion, twenty-eight billion, two hundred twenty-nine million, four hundred thirty-five thousand, seven hundred eighty-one".