307945 has 12 divisors (see below), whose sum is σ = 406980. Its totient is φ = 223520.

The previous prime is 307939. The next prime is 307969. The reversal of 307945 is 549703.

It can be written as a sum of positive squares in 2 ways, for example, as 184041 + 123904 = 429^2 + 352^2 .

It is not a de Polignac number, because 307945 - 2⁷ = 307817 is a prime.

It is a nialpdrome in base 13.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 351 + ... + 859.

It is an arithmetic number, because the mean of its divisors is an integer number (33915).

2³⁰⁷⁹⁴⁵ is an apocalyptic number.

It is an amenable number.

307945 is a deficient number, since it is larger than the sum of its proper divisors (99035).

307945 is a wasteful number, since it uses less digits than its factorization.

307945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 536 (or 525 counting only the distinct ones).

The product of its (nonzero) digits is 3780, while the sum is 28.

The square root of 307945 is about 554.9279232477. The cubic root of 307945 is about 67.5291140982.

The spelling of 307945 in words is "three hundred seven thousand, nine hundred forty-five".