28565745 has 32 divisors (see below), whose sum is σ = 49496832. Its totient is φ = 13984512.

The previous prime is 28565741. The next prime is 28565749. The reversal of 28565745 is 54756582.

It is an interprime number because it is at equal distance from previous prime (28565741) and next prime (28565749).

It is not a de Polignac number, because 28565745 - 2² = 28565741 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28565697 and 28565706.

It is not an unprimeable number, because it can be changed into a prime (28565741) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 51007 + ... + 51563.

It is an arithmetic number, because the mean of its divisors is an integer number (1546776).

Almost surely, 2^28565745 is an apocalyptic number.

It is an amenable number.

28565745 is a deficient number, since it is larger than the sum of its proper divisors (20931087).

28565745 is a wasteful number, since it uses less digits than its factorization.

28565745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 841.

The product of its digits is 336000, while the sum is 42.

The square root of 28565745 is about 5344.6931623808. The cubic root of 28565745 is about 305.6904362210.

The spelling of 28565745 in words is "twenty-eight million, five hundred sixty-five thousand, seven hundred forty-five".