921497568 has 192 divisors, whose sum is σ = 2696601600. Its totient is φ = 274337280.

The previous prime is 921497531. The next prime is 921497573. The reversal of 921497568 is 865794129.

It is a self number, because there is not a number n which added to its sum of digits gives 921497568.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2431203 + ... + 2431581.

It is an arithmetic number, because the mean of its divisors is an integer number (14044800).

Almost surely, 2^921497568 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 921497568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1348300800).

921497568 is an abundant number, since it is smaller than the sum of its proper divisors (1775104032).

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

921497568 is a wasteful number, since it uses less digits than its factorization.

921497568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 485 (or 477 counting only the distinct ones).

The product of its digits is 1088640, while the sum is 51.

The square root of 921497568 is about 30356.1784156043. The cubic root of 921497568 is about 973.1162640141.

The spelling of 921497568 in words is "nine hundred twenty-one million, four hundred ninety-seven thousand, five hundred sixty-eight".