921538272 has 48 divisors (see below), whose sum is σ = 2421876240. Its totient is φ = 306819072.

The previous prime is 921538229. The next prime is 921538279. The reversal of 921538272 is 272835129.

It is a tau number, because it is divible by the number of its divisors (48).

It is a self number, because there is not a number n which added to its sum of digits gives 921538272.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (921538279) 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 7 ways as a sum of consecutive naturals, for example, 84018 + ... + 94350.

It is an arithmetic number, because the mean of its divisors is an integer number (50455755).

Almost surely, 2^921538272 is an apocalyptic number.

It is an amenable number.

921538272 is an abundant number, since it is smaller than the sum of its proper divisors (1500337968).

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

921538272 is a wasteful number, since it uses less digits than its factorization.

921538272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11275 (or 11267 counting only the distinct ones).

The product of its digits is 60480, while the sum is 39.

The square root of 921538272 is about 30356.8488483242. The cubic root of 921538272 is about 973.1305918295.

The spelling of 921538272 in words is "nine hundred twenty-one million, five hundred thirty-eight thousand, two hundred seventy-two".