307640705 has 8 divisors (see below), whose sum is σ = 377754432. Its totient is φ = 240388848.

The previous prime is 307640699. The next prime is 307640713. The reversal of 307640705 is 507046703.

307640705 is nontrivially palindromic in base 6.

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 307640705 - 2⁴ = 307640689 is a prime.

It is a Duffinian number.

It is a Curzon 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, 715229 + ... + 715658.

It is an arithmetic number, because the mean of its divisors is an integer number (47219304).

Almost surely, 2^307640705 is an apocalyptic number.

It is an amenable number.

307640705 is a deficient number, since it is larger than the sum of its proper divisors (70113727).

307640705 is a wasteful number, since it uses less digits than its factorization.

307640705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1430935.

The product of its (nonzero) digits is 17640, while the sum is 32.

The square root of 307640705 is about 17539.6894214236. The cubic root of 307640705 is about 675.0686386534.

The spelling of 307640705 in words is "three hundred seven million, six hundred forty thousand, seven hundred five".