28646343 has 24 divisors (see below), whose sum is σ = 47797776. Its totient is φ = 16339200.

The previous prime is 28646333. The next prime is 28646347. The reversal of 28646343 is 34364682.

It is a happy number.

28646343 is a `hidden beast` number, since 2 + 8 + 646 + 3 + 4 + 3 = 666.

It is not a de Polignac number, because 28646343 - 2⁸ = 28646087 is a prime.

It is a super-2 number, since 2×28646343² = 1641225934547298, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28646298 and 28646307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28646347) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6828 + ... + 10193.

It is an arithmetic number, because the mean of its divisors is an integer number (1991574).

Almost surely, 2^28646343 is an apocalyptic number.

28646343 is a deficient number, since it is larger than the sum of its proper divisors (19151433).

28646343 is a wasteful number, since it uses less digits than its factorization.

28646343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17055 (or 17052 counting only the distinct ones).

The product of its digits is 82944, while the sum is 36.

The square root of 28646343 is about 5352.2278538941. The cubic root of 28646343 is about 305.9776672154.

The spelling of 28646343 in words is "twenty-eight million, six hundred forty-six thousand, three hundred forty-three".