920663720 has 32 divisors (see below), whose sum is σ = 2086408800. Its totient is φ = 365613888.

The previous prime is 920663717. The next prime is 920663729. The reversal of 920663720 is 27366029.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (920663729) 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, 77234 + ... + 88353.

It is an arithmetic number, because the mean of its divisors is an integer number (65200275).

Almost surely, 2^920663720 is an apocalyptic number.

It is an amenable number.

920663720 is an abundant number, since it is smaller than the sum of its proper divisors (1165745080).

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

920663720 is a wasteful number, since it uses less digits than its factorization.

920663720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165737 (or 165733 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 35.

The square root of 920663720 is about 30342.4409037902. The cubic root of 920663720 is about 972.8226564662.

The spelling of 920663720 in words is "nine hundred twenty million, six hundred sixty-three thousand, seven hundred twenty".