821480 has 32 divisors (see below), whose sum is σ = 2017440. Its totient is φ = 298560.

The previous prime is 821479. The next prime is 821489. The reversal of 821480 is 84128.

It is not an unprimeable number, because it can be changed into a prime (821489) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 494 + ... + 1373.

It is an arithmetic number, because the mean of its divisors is an integer number (63045).

2⁸²¹⁴⁸⁰ is an apocalyptic number.

It is an amenable number.

821480 is an abundant number, since it is smaller than the sum of its proper divisors (1195960).

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

821480 is a wasteful number, since it uses less digits than its factorization.

821480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1889 (or 1885 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 23.

The square root of 821480 is about 906.3553387055. The cubic root of 821480 is about 93.6552939901.

The spelling of 821480 in words is "eight hundred twenty-one thousand, four hundred eighty".