28409216351 has 4 divisors (see below), whose sum is σ = 28411350000. Its totient is φ = 28407082704.

The previous prime is 28409216287. The next prime is 28409216369. The reversal of 28409216351 is 15361290482.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15361290482 = 2 ⋅7680645241.

It is a cyclic number.

It is not a de Polignac number, because 28409216351 - 2⁶ = 28409216287 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28409216299 and 28409216308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28409216371) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1046726 + ... + 1073523.

It is an arithmetic number, because the mean of its divisors is an integer number (7102837500).

Almost surely, 2^28409216351 is an apocalyptic number.

28409216351 is a deficient number, since it is larger than the sum of its proper divisors (2133649).

28409216351 is a wasteful number, since it uses less digits than its factorization.

28409216351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2133648.

The product of its (nonzero) digits is 103680, while the sum is 41.

The spelling of 28409216351 in words is "twenty-eight billion, four hundred nine million, two hundred sixteen thousand, three hundred fifty-one".