920640920 has 32 divisors (see below), whose sum is σ = 2094724800. Its totient is φ = 364117248.

The previous prime is 920640913. The next prime is 920640979. The reversal of 920640920 is 29046029.

It is a congruent 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, 125744 + ... + 132863.

It is an arithmetic number, because the mean of its divisors is an integer number (65460150).

Almost surely, 2^920640920 is an apocalyptic number.

It is an amenable number.

920640920 is an abundant number, since it is smaller than the sum of its proper divisors (1174083880).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

920640920 is a wasteful number, since it uses less digits than its factorization.

920640920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258707 (or 258703 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 920640920 is about 30342.0651900954. The cubic root of 920640920 is about 972.8146258324.

Adding to 920640920 its reverse (29046029), we get a palindrome (949686949).

The spelling of 920640920 in words is "nine hundred twenty million, six hundred forty thousand, nine hundred twenty".