820462564 has 6 divisors (see below), whose sum is σ = 1435809494. Its totient is φ = 410231280.

The previous prime is 820462547. The next prime is 820462567. The reversal of 820462564 is 465264028.

820462564 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 818417664 + 2044900 = 28608^2 + 1430^2 .

It is not an unprimeable number, because it can be changed into a prime (820462567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102557817 + ... + 102557824.

Almost surely, 2^820462564 is an apocalyptic number.

It is an amenable number.

820462564 is a deficient number, since it is larger than the sum of its proper divisors (615346930).

820462564 is a wasteful number, since it uses less digits than its factorization.

820462564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205115645 (or 205115643 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 37.

The square root of 820462564 is about 28643.7177056331. The cubic root of 820462564 is about 936.1661273420.

The spelling of 820462564 in words is "eight hundred twenty million, four hundred sixty-two thousand, five hundred sixty-four".