307640749 has 8 divisors (see below), whose sum is σ = 331494912. Its totient is φ = 283813680.

The previous prime is 307640719. The next prime is 307640759. The reversal of 307640749 is 947046703.

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 307640749 - 2¹⁵ = 307607981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (307640719) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21084 + ... + 32554.

It is an arithmetic number, because the mean of its divisors is an integer number (41436864).

Almost surely, 2^307640749 is an apocalyptic number.

It is an amenable number.

307640749 is a deficient number, since it is larger than the sum of its proper divisors (23854163).

307640749 is a wasteful number, since it uses less digits than its factorization.

307640749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13547.

The product of its (nonzero) digits is 127008, while the sum is 40.

The square root of 307640749 is about 17539.6906757217. The cubic root of 307640749 is about 675.0686708371.

The spelling of 307640749 in words is "three hundred seven million, six hundred forty thousand, seven hundred forty-nine".