28409799466 has 8 divisors (see below), whose sum is σ = 43766447940. Its totient is φ = 13820983488.

The previous prime is 28409799461. The next prime is 28409799497. The reversal of 28409799466 is 66499790482.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 25433551441 + 2976248025 = 159479^2 + 54555^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 28409799398 and 28409799407.

It is not an unprimeable number, because it can be changed into a prime (28409799461) 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, 191958031 + ... + 191958178.

Almost surely, 2^28409799466 is an apocalyptic number.

28409799466 is a deficient number, since it is larger than the sum of its proper divisors (15356648474).

28409799466 is a wasteful number, since it uses less digits than its factorization.

28409799466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 383916248.

The product of its (nonzero) digits is 47029248, while the sum is 64.

The spelling of 28409799466 in words is "twenty-eight billion, four hundred nine million, seven hundred ninety-nine thousand, four hundred sixty-six".