921384 has 48 divisors (see below), whose sum is σ = 2545920. Its totient is φ = 300960.

The previous prime is 921379. The next prime is 921407. The reversal of 921384 is 483129.

It is a nude number because it is divisible by every one of its digits.

It is one of the 548 Lynch-Bell numbers.

It is an unprimeable number.

921384 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4729 + ... + 4919.

It is an arithmetic number, because the mean of its divisors is an integer number (53040).

2⁹²¹³⁸⁴ 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 921384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1272960).

921384 is an abundant number, since it is smaller than the sum of its proper divisors (1624536).

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

921384 is a wasteful number, since it uses less digits than its factorization.

921384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270 (or 263 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 921384 is about 959.8874934074. The cubic root of 921384 is about 97.3076285826.

The spelling of 921384 in words is "nine hundred twenty-one thousand, three hundred eighty-four".