307407745 has 24 divisors (see below), whose sum is σ = 394828776. Its totient is φ = 229692672.

The previous prime is 307407721. The next prime is 307407757. The reversal of 307407745 is 547704703.

It can be written as a sum of positive squares in 4 ways, for example, as 22743361 + 284664384 = 4769^2 + 16872^2 .

It is not a de Polignac number, because 307407745 - 2¹¹ = 307405697 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 130599 + ... + 132931.

It is an arithmetic number, because the mean of its divisors is an integer number (16451199).

Almost surely, 2^307407745 is an apocalyptic number.

It is an amenable number.

307407745 is a deficient number, since it is larger than the sum of its proper divisors (87421031).

307407745 is a wasteful number, since it uses less digits than its factorization.

307407745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2449 (or 2430 counting only the distinct ones).

The product of its (nonzero) digits is 82320, while the sum is 37.

The square root of 307407745 is about 17533.0472251688. The cubic root of 307407745 is about 674.8981977244.

The spelling of 307407745 in words is "three hundred seven million, four hundred seven thousand, seven hundred forty-five".