820625284 has 12 divisors (see below), whose sum is σ = 1436341900. Its totient is φ = 410241888.

The previous prime is 820625279. The next prime is 820625297. The reversal of 820625284 is 482526028.

It can be written as a sum of positive squares in 2 ways, for example, as 221354884 + 599270400 = 14878^2 + 24480^2 .

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, 15202 + ... + 43270.

Almost surely, 2^820625284 is an apocalyptic number.

It is an amenable number.

820625284 is a deficient number, since it is larger than the sum of its proper divisors (615716616).

820625284 is a wasteful number, since it uses less digits than its factorization.

820625284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35382 (or 35380 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 37.

The square root of 820625284 is about 28646.5579782284. The cubic root of 820625284 is about 936.2280123036.

The spelling of 820625284 in words is "eight hundred twenty million, six hundred twenty-five thousand, two hundred eighty-four".