28403782347797 has 8 divisors (see below), whose sum is σ = 30074773815000. Its totient is φ = 26732810962944.

The previous prime is 28403782347781. The next prime is 28403782347803. The reversal of 28403782347797 is 79774328730482.

It can be written as a sum of positive squares in 4 ways, for example, as 21043055227441 + 7360727120356 = 4587271^2 + 2713066^2 .

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 28403782347797 - 2⁴ = 28403782347781 is a prime.

It is a super-2 number, since 2×28403782347797² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28403782347797.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28403782344797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2058722 + ... + 7813187.

It is an arithmetic number, because the mean of its divisors is an integer number (3759346726875).

Almost surely, 2^{28403782347797} is an apocalyptic number.

It is an amenable number.

28403782347797 is a deficient number, since it is larger than the sum of its proper divisors (1670991467203).

28403782347797 is a wasteful number, since it uses less digits than its factorization.

28403782347797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10041175.

The product of its (nonzero) digits is 796594176, while the sum is 71.

The spelling of 28403782347797 in words is "twenty-eight trillion, four hundred three billion, seven hundred eighty-two million, three hundred forty-seven thousand, seven hundred ninety-seven".