920509768 has 8 divisors (see below), whose sum is σ = 1725955830. Its totient is φ = 460254880.

The previous prime is 920509649. The next prime is 920509781. The reversal of 920509768 is 867905029.

It can be written as a sum of positive squares in only one way, i.e., 899880004 + 20629764 = 29998^2 + 4542^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57531853 + ... + 57531868.

Almost surely, 2^920509768 is an apocalyptic number.

It is an amenable number.

920509768 is a deficient number, since it is larger than the sum of its proper divisors (805446062).

920509768 is a wasteful number, since it uses less digits than its factorization.

920509768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115063727 (or 115063723 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 46.

The square root of 920509768 is about 30339.9038891029. The cubic root of 920509768 is about 972.7684287973.

The spelling of 920509768 in words is "nine hundred twenty million, five hundred nine thousand, seven hundred sixty-eight".