921889532 has 48 divisors (see below), whose sum is σ = 1774789632. Its totient is φ = 417104640.

The previous prime is 921889531. The next prime is 921889541. The reversal of 921889532 is 235988129.

It is a super-2 number, since 2×921889532² = 1699760618422358048, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (921889531) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 342263 + ... + 344945.

It is an arithmetic number, because the mean of its divisors is an integer number (36974784).

Almost surely, 2^921889532 is an apocalyptic number.

It is an amenable number.

921889532 is a deficient number, since it is larger than the sum of its proper divisors (852900100).

921889532 is a wasteful number, since it uses less digits than its factorization.

921889532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2898 (or 2896 counting only the distinct ones).

The product of its digits is 311040, while the sum is 47.

The square root of 921889532 is about 30362.6338119736. The cubic root of 921889532 is about 973.2542178871.

The spelling of 921889532 in words is "nine hundred twenty-one million, eight hundred eighty-nine thousand, five hundred thirty-two".