28101745 has 24 divisors (see below), whose sum is σ = 40941504. Its totient is φ = 18428256.

The previous prime is 28101739. The next prime is 28101751. The reversal of 28101745 is 54710182.

It is an interprime number because it is at equal distance from previous prime (28101739) and next prime (28101751).

It is not a de Polignac number, because 28101745 - 2¹⁷ = 27970673 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 3142 + ... + 8128.

It is an arithmetic number, because the mean of its divisors is an integer number (1705896).

Almost surely, 2^28101745 is an apocalyptic number.

It is an amenable number.

28101745 is a deficient number, since it is larger than the sum of its proper divisors (12839759).

28101745 is a wasteful number, since it uses less digits than its factorization.

28101745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5029 (or 5022 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 28.

The square root of 28101745 is about 5301.1079030708. The cubic root of 28101745 is about 304.0262594179.

The spelling of 28101745 in words is "twenty-eight million, one hundred one thousand, seven hundred forty-five".