28946945 has 8 divisors (see below), whose sum is σ = 34945344. Its totient is φ = 23018224.

The previous prime is 28946941. The next prime is 28946977. The reversal of 28946945 is 54964982.

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 28946945 - 2² = 28946941 is a prime.

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 28946945.

It is not an unprimeable number, because it can be changed into a prime (28946941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16499 + ... + 18168.

It is an arithmetic number, because the mean of its divisors is an integer number (4368168).

Almost surely, 2^28946945 is an apocalyptic number.

It is an amenable number.

28946945 is a deficient number, since it is larger than the sum of its proper divisors (5998399).

28946945 is a wasteful number, since it uses less digits than its factorization.

28946945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34839.

The product of its digits is 622080, while the sum is 47.

The square root of 28946945 is about 5380.2365189646. The cubic root of 28946945 is about 307.0442098406.

The spelling of 28946945 in words is "twenty-eight million, nine hundred forty-six thousand, nine hundred forty-five".