28348335641 has 2 divisors, whose sum is σ = 28348335642. Its totient is φ = 28348335640.

The previous prime is 28348335623. The next prime is 28348335721. The reversal of 28348335641 is 14653384382.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25867897225 + 2480438416 = 160835^2 + 49804^2 .

It is a cyclic number.

It is not a de Polignac number, because 28348335641 - 2²² = 28344141337 is a prime.

It is a super-3 number, since 3×28348335641³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (28348335611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14174167820 + 14174167821.

It is an arithmetic number, because the mean of its divisors is an integer number (14174167821).

Almost surely, 2^28348335641 is an apocalyptic number.

It is an amenable number.

28348335641 is a deficient number, since it is larger than the sum of its proper divisors (1).

28348335641 is an equidigital number, since it uses as much as digits as its factorization.

28348335641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1658880, while the sum is 47.

The spelling of 28348335641 in words is "twenty-eight billion, three hundred forty-eight million, three hundred thirty-five thousand, six hundred forty-one".