307845 has 12 divisors (see below), whose sum is σ = 533676. Its totient is φ = 164160.

The previous prime is 307843. The next prime is 307859. The reversal of 307845 is 548703.

It can be written as a sum of positive squares in 2 ways, for example, as 173889 + 133956 = 417^2 + 366^2 .

It is not a de Polignac number, because 307845 - 2¹ = 307843 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (307843) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3376 + ... + 3465.

It is an arithmetic number, because the mean of its divisors is an integer number (44473).

2³⁰⁷⁸⁴⁵ is an apocalyptic number.

It is an amenable number.

307845 is a deficient number, since it is larger than the sum of its proper divisors (225831).

307845 is a wasteful number, since it uses less digits than its factorization.

307845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6852 (or 6849 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 307845 is about 554.8378141403. The cubic root of 307845 is about 67.5218036559.

It can be divided in two parts, 30 and 7845, that added together give a triangular number (7875 = T₁₂₅).

The spelling of 307845 in words is "three hundred seven thousand, eight hundred forty-five".