307445 has 8 divisors (see below), whose sum is σ = 390744. Its totient is φ = 231424.

The previous prime is 307423. The next prime is 307451. The reversal of 307445 is 544703.

It can be written as a sum of positive squares in 4 ways, for example, as 3844 + 303601 = 62^2 + 551^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 307445 - 2⁶ = 307381 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 307445.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1724 + ... + 1893.

It is an arithmetic number, because the mean of its divisors is an integer number (48843).

2³⁰⁷⁴⁴⁵ is an apocalyptic number.

It is an amenable number.

307445 is a deficient number, since it is larger than the sum of its proper divisors (83299).

307445 is a wasteful number, since it uses less digits than its factorization.

307445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3639.

The product of its (nonzero) digits is 1680, while the sum is 23.

The square root of 307445 is about 554.4772312728. The cubic root of 307445 is about 67.4925460448.

The spelling of 307445 in words is "three hundred seven thousand, four hundred forty-five".