820454470 has 32 divisors (see below), whose sum is σ = 1613325600. Its totient is φ = 297930240.

The previous prime is 820454449. The next prime is 820454473. The reversal of 820454470 is 74454028.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (820454473) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 80206 + ... + 89854.

It is an arithmetic number, because the mean of its divisors is an integer number (50416425).

Almost surely, 2^820454470 is an apocalyptic number.

820454470 is a deficient number, since it is larger than the sum of its proper divisors (792871130).

820454470 is a wasteful number, since it uses less digits than its factorization.

820454470 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10440.

The product of its (nonzero) digits is 35840, while the sum is 34.

The square root of 820454470 is about 28643.5764177590. The cubic root of 820454470 is about 936.1630488535.

The spelling of 820454470 in words is "eight hundred twenty million, four hundred fifty-four thousand, four hundred seventy".