28790745 has 8 divisors (see below), whose sum is σ = 46065216. Its totient is φ = 15355056.

The previous prime is 28790731. The next prime is 28790753. The reversal of 28790745 is 54709782.

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

It is not a de Polignac number, because 28790745 - 2¹² = 28786649 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 28790697 and 28790706.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 959677 + ... + 959706.

It is an arithmetic number, because the mean of its divisors is an integer number (5758152).

Almost surely, 2^28790745 is an apocalyptic number.

It is an amenable number.

28790745 is a deficient number, since it is larger than the sum of its proper divisors (17274471).

28790745 is a wasteful number, since it uses less digits than its factorization.

28790745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1919391.

The product of its (nonzero) digits is 141120, while the sum is 42.

The square root of 28790745 is about 5365.7007929999. The cubic root of 28790745 is about 306.4909352091.

The spelling of 28790745 in words is "twenty-eight million, seven hundred ninety thousand, seven hundred forty-five".