921480 has 64 divisors (see below), whose sum is σ = 3162240. Its totient is φ = 210432.

The previous prime is 921467. The next prime is 921491. The reversal of 921480 is 84129.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 921480.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 921480.

It is an unprimeable number.

921480 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 15 ways as a sum of consecutive naturals, for example, 292 + ... + 1388.

It is an arithmetic number, because the mean of its divisors is an integer number (49410).

2⁹²¹⁴⁸⁰ 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 921480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1581120).

921480 is an abundant number, since it is smaller than the sum of its proper divisors (2240760).

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

921480 is a wasteful number, since it uses less digits than its factorization.

921480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1118 (or 1114 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 921480 is about 959.9374979654. The cubic root of 921480 is about 97.3110079945.

The spelling of 921480 in words is "nine hundred twenty-one thousand, four hundred eighty".