28910345 has 8 divisors (see below), whose sum is σ = 34774080. Its totient is φ = 23073840.

The previous prime is 28910327. The next prime is 28910351. The reversal of 28910345 is 54301982.

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

It is not a de Polignac number, because 28910345 - 2¹² = 28906249 is a prime.

It is a Curzon number.

It is an unprimeable number.

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, 4391 + ... + 8780.

It is an arithmetic number, because the mean of its divisors is an integer number (4346760).

Almost surely, 2^28910345 is an apocalyptic number.

It is an amenable number.

28910345 is a deficient number, since it is larger than the sum of its proper divisors (5863735).

28910345 is a wasteful number, since it uses less digits than its factorization.

28910345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13615.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 28910345 is about 5376.8341056797. The cubic root of 28910345 is about 306.9147481915.

The spelling of 28910345 in words is "twenty-eight million, nine hundred ten thousand, three hundred forty-five".