307890645 has 16 divisors (see below), whose sum is σ = 492847872. Its totient is φ = 164134080.

The previous prime is 307890643. The next prime is 307890647. The reversal of 307890645 is 546098703.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (307890643) and next prime (307890647).

It is not a de Polignac number, because 307890645 - 2¹ = 307890643 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 307890597 and 307890606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (307890641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51639 + ... + 57291.

It is an arithmetic number, because the mean of its divisors is an integer number (30802992).

Almost surely, 2^307890645 is an apocalyptic number.

It is an amenable number.

307890645 is a deficient number, since it is larger than the sum of its proper divisors (184957227).

307890645 is a wasteful number, since it uses less digits than its factorization.

307890645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9292.

The product of its (nonzero) digits is 181440, while the sum is 42.

The square root of 307890645 is about 17546.8129584834. The cubic root of 307890645 is about 675.2514070365.

The spelling of 307890645 in words is "three hundred seven million, eight hundred ninety thousand, six hundred forty-five".