28763945 has 8 divisors (see below), whose sum is σ = 39447744. Its totient is φ = 19723824.

The previous prime is 28763941. The next prime is 28763951. The reversal of 28763945 is 54936782.

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 28763945 - 2² = 28763941 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28763896 and 28763905.

It is not an unprimeable number, because it can be changed into a prime (28763941) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 410879 + ... + 410948.

It is an arithmetic number, because the mean of its divisors is an integer number (4930968).

Almost surely, 2^28763945 is an apocalyptic number.

It is an amenable number.

28763945 is a deficient number, since it is larger than the sum of its proper divisors (10683799).

28763945 is an equidigital number, since it uses as much as digits as its factorization.

28763945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 821839.

The product of its digits is 362880, while the sum is 44.

The square root of 28763945 is about 5363.2028676902. The cubic root of 28763945 is about 306.3958061778.

The spelling of 28763945 in words is "twenty-eight million, seven hundred sixty-three thousand, nine hundred forty-five".