921632 has 24 divisors (see below), whose sum is σ = 1841616. Its totient is φ = 453952.

The previous prime is 921629. The next prime is 921637. The reversal of 921632 is 236129.

It is an alternating number because its digits alternate between odd and even.

It is a junction number, because it is equal to n+sod(n) for n = 921598 and 921607.

It is not an unprimeable number, because it can be changed into a prime (921637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2483 + ... + 2829.

It is an arithmetic number, because the mean of its divisors is an integer number (76734).

2⁹²¹⁶³² is an apocalyptic number.

It is an amenable number.

921632 is a deficient number, since it is larger than the sum of its proper divisors (919984).

921632 is a wasteful number, since it uses less digits than its factorization.

921632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 440 (or 432 counting only the distinct ones).

The product of its digits is 648, while the sum is 23.

The square root of 921632 is about 960.0166665220. The cubic root of 921632 is about 97.3163582498.

The spelling of 921632 in words is "nine hundred twenty-one thousand, six hundred thirty-two".