921967228 has 48 divisors (see below), whose sum is σ = 2028063744. Its totient is φ = 356967360.

The previous prime is 921967223. The next prime is 921967231. The reversal of 921967228 is 822769129.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (921967223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9838 + ... + 44053.

It is an arithmetic number, because the mean of its divisors is an integer number (42251328).

Almost surely, 2^921967228 is an apocalyptic number.

It is an amenable number.

921967228 is an abundant number, since it is smaller than the sum of its proper divisors (1106096516).

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

921967228 is a wasteful number, since it uses less digits than its factorization.

921967228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53962 (or 53960 counting only the distinct ones).

The product of its digits is 217728, while the sum is 46.

The square root of 921967228 is about 30363.9132524120. The cubic root of 921967228 is about 973.2815587752.

The spelling of 921967228 in words is "nine hundred twenty-one million, nine hundred sixty-seven thousand, two hundred twenty-eight".