821527480 has 16 divisors (see below), whose sum is σ = 1848436920. Its totient is φ = 328610976.

The previous prime is 821527471. The next prime is 821527519. The reversal of 821527480 is 84725128.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10269054 + ... + 10269133.

Almost surely, 2^821527480 is an apocalyptic number.

It is an amenable number.

821527480 is an abundant number, since it is smaller than the sum of its proper divisors (1026909440).

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

821527480 is a wasteful number, since it uses less digits than its factorization.

821527480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20538198 (or 20538194 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 37.

The square root of 821527480 is about 28662.3006752773. The cubic root of 821527480 is about 936.5709832197.

The spelling of 821527480 in words is "eight hundred twenty-one million, five hundred twenty-seven thousand, four hundred eighty".