820481859 has 8 divisors (see below), whose sum is σ = 1215528720. Its totient is φ = 546987888.

The previous prime is 820481819. The next prime is 820481861. The reversal of 820481859 is 958184028.

It is a happy number.

It is not a de Polignac number, because 820481859 - 2¹¹ = 820479811 is a prime.

It is not an unprimeable number, because it can be changed into a prime (820481819) 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, 15194082 + ... + 15194135.

It is an arithmetic number, because the mean of its divisors is an integer number (151941090).

Almost surely, 2^820481859 is an apocalyptic number.

820481859 is a deficient number, since it is larger than the sum of its proper divisors (395046861).

820481859 is a wasteful number, since it uses less digits than its factorization.

820481859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30388226 (or 30388220 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 45.

The square root of 820481859 is about 28644.0545139825. The cubic root of 820481859 is about 936.1734659599.

The spelling of 820481859 in words is "eight hundred twenty million, four hundred eighty-one thousand, eight hundred fifty-nine".