28670745 has 16 divisors (see below), whose sum is σ = 47113920. Its totient is φ = 14877504.

The previous prime is 28670731. The next prime is 28670777. The reversal of 28670745 is 54707682.

It is not a de Polignac number, because 28670745 - 2⁵ = 28670713 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25275 + ... + 26384.

It is an arithmetic number, because the mean of its divisors is an integer number (2944620).

Almost surely, 2^28670745 is an apocalyptic number.

It is an amenable number.

28670745 is a deficient number, since it is larger than the sum of its proper divisors (18443175).

28670745 is a wasteful number, since it uses less digits than its factorization.

28670745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51704.

The product of its (nonzero) digits is 94080, while the sum is 39.

The square root of 28670745 is about 5354.5069801056. The cubic root of 28670745 is about 306.0645235374.

The spelling of 28670745 in words is "twenty-eight million, six hundred seventy thousand, seven hundred forty-five".