28101345 has 32 divisors (see below), whose sum is σ = 46792704. Its totient is φ = 14385600.

The previous prime is 28101343. The next prime is 28101349. The reversal of 28101345 is 54310182.

It is not a de Polignac number, because 28101345 - 2¹ = 28101343 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28101343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 103560 + ... + 103830.

It is an arithmetic number, because the mean of its divisors is an integer number (1462272).

Almost surely, 2^28101345 is an apocalyptic number.

It is an amenable number.

28101345 is a deficient number, since it is larger than the sum of its proper divisors (18691359).

28101345 is a wasteful number, since it uses less digits than its factorization.

28101345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 533.

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 28101345 is about 5301.0701749741. The cubic root of 28101345 is about 304.0248169087.

The spelling of 28101345 in words is "twenty-eight million, one hundred one thousand, three hundred forty-five".