821181468 has 24 divisors (see below), whose sum is σ = 1917021568. Its totient is φ = 273594096.

The previous prime is 821181461. The next prime is 821181521. The reversal of 821181468 is 864181128.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (821181461) 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, 10905 + ... + 41967.

Almost surely, 2^821181468 is an apocalyptic number.

It is an amenable number.

821181468 is an abundant number, since it is smaller than the sum of its proper divisors (1095840100).

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

821181468 is a wasteful number, since it uses less digits than its factorization.

821181468 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33273 (or 33271 counting only the distinct ones).

The product of its digits is 24576, while the sum is 39.

The square root of 821181468 is about 28656.2640272594. The cubic root of 821181468 is about 936.4394760317.

The spelling of 821181468 in words is "eight hundred twenty-one million, one hundred eighty-one thousand, four hundred sixty-eight".