920645306 has 32 divisors (see below), whose sum is σ = 1638323712. Its totient is φ = 379820160.

The previous prime is 920645303. The next prime is 920645309. The reversal of 920645306 is 603546029.

It is an interprime number because it is at equal distance from previous prime (920645303) and next prime (920645309).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (920645303) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28670 + ... + 51606.

It is an arithmetic number, because the mean of its divisors is an integer number (51197616).

Almost surely, 2^920645306 is an apocalyptic number.

920645306 is a deficient number, since it is larger than the sum of its proper divisors (717678406).

920645306 is a wasteful number, since it uses less digits than its factorization.

920645306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23054.

The product of its (nonzero) digits is 38880, while the sum is 35.

The square root of 920645306 is about 30342.1374659070. The cubic root of 920645306 is about 972.8161706831.

The spelling of 920645306 in words is "nine hundred twenty million, six hundred forty-five thousand, three hundred six".