821469474 has 48 divisors (see below), whose sum is σ = 2035882368. Its totient is φ = 234501696.

The previous prime is 821469443. The next prime is 821469521. The reversal of 821469474 is 474964128.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 200454 + ... + 204510.

It is an arithmetic number, because the mean of its divisors is an integer number (42414216).

Almost surely, 2^821469474 is an apocalyptic number.

821469474 is an abundant number, since it is smaller than the sum of its proper divisors (1214412894).

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

821469474 is a wasteful number, since it uses less digits than its factorization.

821469474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5679 (or 5676 counting only the distinct ones).

The product of its digits is 387072, while the sum is 45.

The square root of 821469474 is about 28661.2887707444. The cubic root of 821469474 is about 936.5489397229.

The spelling of 821469474 in words is "eight hundred twenty-one million, four hundred sixty-nine thousand, four hundred seventy-four".