8307945 has 36 divisors (see below), whose sum is σ = 15096900. Its totient is φ = 4226112.

The previous prime is 8307931. The next prime is 8307961. The reversal of 8307945 is 5497038.

It can be written as a sum of positive squares in 2 ways, for example, as 4575321 + 3732624 = 2139^2 + 1932^2 .

It is not a de Polignac number, because 8307945 - 2⁵ = 8307913 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 23631 + ... + 23979.

Almost surely, 2^8307945 is an apocalyptic number.

It is an amenable number.

8307945 is a deficient number, since it is larger than the sum of its proper divisors (6788955).

8307945 is a wasteful number, since it uses less digits than its factorization.

8307945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 406 (or 380 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 8307945 is about 2882.3506032403. The cubic root of 8307945 is about 202.5339677815.

The spelling of 8307945 in words is "eight million, three hundred seven thousand, nine hundred forty-five".